Bump Microsoft.CodeAnalysis.FxCopAnalyzers from 2.9.3 to 2.9.4 in /src

Bumps [Microsoft.CodeAnalysis.FxCopAnalyzers](https://github.com/dotnet/roslyn-analyzers) from 2.9.3 to 2.9.4.
- [Release notes](https://github.com/dotnet/roslyn-analyzers/releases)
- [Changelog](https://github.com/dotnet/roslyn-analyzers/blob/master/PostReleaseActivities.md)
- [Commits](dotnet/roslyn-analyzers@v2.9.3...v2.9.4)

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

src/Cake.Issues.EsLint/Cake.Issues.EsLint.csproj

@@ -26,7 +26,7 @@
   <ItemGroup>
     <PackageReference Include="Cake.Core" Version="0.33.0" PrivateAssets="All" />
     <PackageReference Include="Cake.Issues" Version="0.7.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.3" />
+    <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.4" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" />
     <PackageReference Include="System.Runtime.Serialization.Json" Version="4.3.0" />
   </ItemGroup>