docs: improve metamodel reference

docs/how-to/generated_docs.rst

@@ -21,7 +21,7 @@ When a script or tool creates documentation content at build time, collect it
 with a ``docs_bundle`` and mount the bundle into your documentation tree.
 
 You find a `complete working example <https://github.com/eclipse-score/docs-as-code/tree/main/src/extensions/score_metamodel/docs/>`_
-in the :ref:`metamodel-types-visualization`.
+in the :ref:`metamodel-reference`.
 
 Which ``data`` attribute?
 -------------------------

src/extensions/score_metamodel/docs/BUILD

@@ -20,7 +20,10 @@ genrule(
     srcs = [
         "//src/extensions/score_metamodel:metamodel_yaml",
     ],
-    outs = ["generated/index.rst", "generated/metamodel_classes.mmd"],
+    outs = [
+        "generated/index.rst",
+        "generated/metamodel_classes.mmd",
+    ],
     cmd = "$(location :generate_metamodel_rst_bin) --rst-output $(location generated/index.rst) --mmd-output $(location generated/metamodel_classes.mmd) $(location //src/extensions/score_metamodel:metamodel_yaml)",
     tools = [":generate_metamodel_rst_bin"],
     visibility = ["//visibility:private"],