build(deps): bump AutoFixture from 4.18.0 to 4.18.1 (#1629)

Bumps [AutoFixture](https://github.com/AutoFixture/AutoFixture) from 4.18.0 to 4.18.1.
- [Release notes](https://github.com/AutoFixture/AutoFixture/releases)
- [Commits](https://github.com/AutoFixture/AutoFixture/compare/v4.18.0...v4.18.1)

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

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

Refit.Benchmarks/Refit.Benchmarks.csproj

@@ -17,7 +17,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="AutoFixture" Version="4.18.0" />
+      <PackageReference Include="AutoFixture" Version="4.18.1" />
       <PackageReference Include="BenchmarkDotNet" Version="0.13.10" />
     </ItemGroup>