Bump CommunityToolkit.Diagnostics from 8.4.0 to 8.4.2 (#669)

---
updated-dependencies:
- dependency-name: CommunityToolkit.Diagnostics
  dependency-version: 8.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

OSLC4Net_SDK/Directory.Packages.props

@@ -19,7 +19,7 @@
     <PackageVersion Include="dotNetRdf.Core" Version="$(DotNetRdfVersion)" />
     <PackageVersion Include="dotNetRdf.Inferencing" Version="$(DotNetRdfVersion)" />
     <PackageVersion Include="Antlr3.Runtime" Version="3.5.1" />
-    <PackageVersion Include="CommunityToolkit.Diagnostics" Version="8.4.0" />
+    <PackageVersion Include="CommunityToolkit.Diagnostics" Version="8.4.2" />
     <!-- conneg support &c for System.Net.Http -->
     <PackageVersion Include="Microsoft.AspNet.WebApi.Client" Version="6.0.0" />
     <!-- misc -->