Bump SonarAnalyzer.CSharp from 9.20.0.85982 to 9.21.0.86780

Bumps [SonarAnalyzer.CSharp](https://github.com/SonarSource/sonar-dotnet) from 9.20.0.85982 to 9.21.0.86780.
- [Release notes](https://github.com/SonarSource/sonar-dotnet/releases)
- [Commits](SonarSource/sonar-dotnet@9.20.0.85982...9.21.0.86780)

---
updated-dependencies:
- dependency-name: SonarAnalyzer.CSharp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/AddUp.CommonLogging.NLog/AddUp.CommonLogging.NLog.csproj

@@ -35,7 +35,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="SonarAnalyzer.CSharp" Version="9.20.0.85982">
+    <PackageReference Include="SonarAnalyzer.CSharp" Version="9.21.0.86780">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

src/AddUp.CommonLogging/AddUp.CommonLogging.csproj

@@ -25,7 +25,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="SonarAnalyzer.CSharp" Version="9.20.0.85982">
+    <PackageReference Include="SonarAnalyzer.CSharp" Version="9.21.0.86780">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>    

src/tests/UnitTests.AddUp.CommonLogging/UnitTests.AddUp.CommonLogging.csproj

@@ -27,7 +27,7 @@
     <PackageReference Include="NUnit" Version="4.1.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Rhino.Mocks.Standard" Version="1.0.0" />
-    <PackageReference Include="SonarAnalyzer.CSharp" Version="9.20.0.85982">
+    <PackageReference Include="SonarAnalyzer.CSharp" Version="9.21.0.86780">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>