ci: pin site-link-validator to 0.2.5 and fix broken doc links

.github/workflows/link-validator.yml

@@ -54,4 +54,4 @@ jobs:
           sbt -Dpekko.genjavadoc.enabled=true "Javaunidoc/doc; Compile/unidoc; docs/paradox"
 
       - name: Run Link Validator
-        run: cs launch net.runne::site-link-validator:0.3.0 -- scripts/link-validator.conf $GITHUB_STEP_SUMMARY
+        run: cs launch net.runne::site-link-validator:0.2.5 -- scripts/link-validator.conf

cluster-metrics/src/main/scala/org/apache/pekko/cluster/metrics/MetricsCollector.scala

@@ -248,7 +248,7 @@ class SigarMetricsCollector(address: Address, decayFactor: Double, sigar: SigarP
   /**
    * (SIGAR) Returns the stolen CPU time. Relevant to virtual hosting environments.
    * For details please see: <a href="https://en.wikipedia.org/wiki/CPU_time#Subdivision">Wikipedia - CPU time subdivision</a> and
-   * <a href="https://www.datadoghq.com/2013/08/understanding-aws-stolen-cpu-and-how-it-affects-your-apps/">Understanding AWS stolen CPU and how it affects your apps</a>
+   * <a href="https://www.datadoghq.com/blog/understanding-aws-stolen-cpu-and-how-it-affects-your-apps/">Understanding AWS stolen CPU and how it affects your apps</a>
    *
    * Creates a new instance each time.
    */

docs/src/main/paradox/cluster-metrics.md

@@ -114,7 +114,7 @@ To enable usage of Sigar you can add the following dependency to the user projec
   version="$sigar_loader.version$"
 }
 
-You can download Kamon sigar-loader from [Maven Central](https://search.maven.org/search?q=sigar-loader)
+You can download Kamon sigar-loader from [Sonatype Central](https://central.sonatype.com/artifact/io.kamon/sigar-loader)
 
 ## Adaptive Load Balancing
 

docs/src/main/paradox/project/links.md

@@ -7,7 +7,7 @@ Pekko uses Git and is hosted at [Github apache/pekko](https://github.com/apache/
 ## Releases Repository
 
 All Pekko releases are published via Sonatype to Maven Central, see
-[search.maven.org](https://search.maven.org/search?q=g:org.apache.pekko)
+[Sonatype Central](https://central.sonatype.com/namespace/org.apache.pekko)
 
 ## Snapshots Repository
 

docs/src/main/paradox/remoting-artery.md

@@ -601,7 +601,7 @@ The classpath would be approximately (but you will need to fix up the version nu
 agrona-2.6.0.jar:aeron-driver-1.53.1.jar:aeron-client-1.53.1.jar
 ```
 
-You find those jar files on [Maven Central](https://search.maven.org/), or you can create a
+You find those jar files on [Sonatype Central](https://central.sonatype.com/), or you can create a
 package with your preferred build tool.
 
 You can pass [Aeron properties](https://github.com/real-logic/Aeron/wiki/Configuration-Options) as

docs/src/main/paradox/typed/logging.md

@@ -199,7 +199,7 @@ A starting point for configuration of `logback.xml` for production:
 
 @@snip [logback.xml](/actor-typed-tests/src/test/resources/logback-doc-prod.xml)
 
-Note that the [AsyncAppender](https://logback.qos.ch/apidocs/ch.qos.logback.classic/ch/qos/logback/classic/AsyncAppender.html) may drop log events if the queue becomes full, which may happen if the
+Note that the [AsyncAppender](https://logback.qos.ch/manual/appenders.html#AsyncAppender) may drop log events if the queue becomes full, which may happen if the
 logging backend can't keep up with the throughput of produced log events. Dropping log events is necessary
 if you want to gracefully degrade your application if only your logging backend or filesystem is experiencing
 issues. 

project/Paradox.scala

@@ -33,7 +33,7 @@ object Paradox {
       GitHub
         .url(version.value), // for links like this: @github[#1](#1) or @github[83986f9](83986f9)
       "extref.pekko.http.base_url" -> s"$pekkoBaseURL/docs/pekko-http/current/%s",
-      "extref.pekko-management.base_url" -> s"$pekkoBaseURL/docs/pekko-management/current/%s",
+      "extref.pekko-management.base_url" -> s"$pekkoBaseURL/docs/pekko-management/2.0/%s",
       "extref.pekko-management-snapshot.base_url" -> s"$pekkoBaseURL/docs/pekko-management/snapshot/%s",
       "extref.platform-guide.base_url" -> "https://developer.lightbend.com/docs/akka-platform-guide/%s",
       "extref.wikipedia.base_url" -> "https://en.wikipedia.org/wiki/%s",

scripts/link-validator.conf

@@ -51,10 +51,13 @@ site-link-validator {
   ignore-prefixes = [
     ## GitHub will block with "429 Too Many Requests"
     "https://github.com/"
-    "https://www.scala-lang.org/api/2.13.18/scala/runtime/AbstractFunction1.html"
-    "https://www.scala-lang.org/api/2.13.18/scala/runtime/AbstractFunction2.html"
-    "https://www.scala-lang.org/api/2.13.18/scala/runtime/AbstractFunction3.html"
-    "https://www.scala-lang.org/api/2.13.18/scala/runtime/AbstractPartialFunction.html"
+    ## These sites block automated clients with "403 Forbidden"
+    "https://bugs.openjdk.org/"
+    "https://cowtowncoder.medium.com/"
+    "https://stackoverflow.com/"
+    "https://waldo.scholars.harvard.edu/"
+    ## scala.runtime is not part of the published Scaladoc
+    "https://www.scala-lang.org/api/2.13.18/scala/runtime/"
     ## Bug, see https://github.com/scala/bug/issues/12807 and https://github.com/lampepfl/dotty/issues/17973
     "https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/nio/file/StandardOpenOption$.html"
   ]