build(deps): bump stylecop.analyzers in /samples

Bumps [stylecop.analyzers](https://github.com/DotNetAnalyzers/StyleCopAnalyzers) from 1.2.0-beta.435 to 1.2.0-beta.507.
- [Release notes](https://github.com/DotNetAnalyzers/StyleCopAnalyzers/releases)
- [Changelog](https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/KnownChanges.md)
- [Commits](DotNetAnalyzers/StyleCopAnalyzers@1.2.0-beta.435...1.2.0-beta.507)

---
updated-dependencies:
- dependency-name: stylecop.analyzers
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

samples/Directory.build.props

@@ -4,7 +4,7 @@
     <WarningsAsErrors>CS8600;CS8602;CS8603;CS8604;CS8605;CS8606;CS8607;CS8608;CS8609;CS8610;CS8611;CS8612;CS8613;CS8614;CS8615;CS8616;CS8617;CS8618;CS8619;CS8620;CS8621;CS8622;CS8623;CS8624;CS8625</WarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.435" PrivateAssets="all" />
+    <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.507" PrivateAssets="all" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.3.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="7.0.1" PrivateAssets="all" />
   </ItemGroup>