Bump NUnit.Analyzers from 4.8.1 to 4.9.1 (#89)

---
updated-dependencies:
- dependency-name: NUnit.Analyzers
  dependency-version: 4.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="Nuke.Components" Version="8.1.4" />
     <PackageVersion Include="NUnit" Version="4.3.2" />
-    <PackageVersion Include="NUnit.Analyzers" Version="4.8.1" />
+    <PackageVersion Include="NUnit.Analyzers" Version="4.9.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="5.0.0" />
     <PackageVersion Include="SharpZipLib" Version="1.4.2" />
     <PackageVersion Include="Spectre.Console.Cli" Version="0.50.0" />