Bump FluentAssertions.Analyzers from 0.19.1 to 0.20.0

Bumps [FluentAssertions.Analyzers](https://github.com/fluentassertions/fluentassertions.analyzers) from 0.19.1 to 0.20.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions.analyzers/releases)
- [Commits](fluentassertions/fluentassertions.analyzers@v0.19.1...0.20.0)

---
updated-dependencies:
- dependency-name: FluentAssertions.Analyzers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

ConfigAdapter.Test/ConfigAdapter.Test.csproj

@@ -13,7 +13,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.11.0" />
-    <PackageReference Include="FluentAssertions.Analyzers" Version="0.19.1" />
+    <PackageReference Include="FluentAssertions.Analyzers" Version="0.20.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.2" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.0.4" />
     <PackageReference Include="MSTest.TestFramework" Version="3.0.4" />