Bump Microsoft.Graph from 6.5.0 to 6.6.0 (#434)

---
updated-dependencies:
- dependency-name: Microsoft.Graph
  dependency-version: 6.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

GraphOrgExample/GraphOrgExample.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.Identity" Version="1.21.0" />
-    <PackageReference Include="Microsoft.Graph" Version="6.5.0" />
+    <PackageReference Include="Microsoft.Graph" Version="6.6.0" />
     <PackageReference Include="Microsoft.Identity.Client" Version="4.88.0" />
     <PackageReference Include="Microsoft.Identity.Web.MicrosoftGraph" Version="4.14.2" />
     <PackageReference Include="Microsoft.Identity.Web.UI" Version="4.14.2" />