Bump AutoFixture from 4.17.0 to 4.18.0

Bumps [AutoFixture](https://github.com/AutoFixture/AutoFixture) from 4.17.0 to 4.18.0.
- [Release notes](https://github.com/AutoFixture/AutoFixture/releases)
- [Commits](AutoFixture/AutoFixture@v4.17.0...v4.18.0)

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

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

tests/JustSaying.TestingFramework/JustSaying.TestingFramework.csproj

@@ -7,7 +7,7 @@
     <ProjectReference Include="..\..\src\JustSaying.Extensions.DependencyInjection.Microsoft\JustSaying.Extensions.DependencyInjection.Microsoft.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="AutoFixture" Version="4.17.0" />
+    <PackageReference Include="AutoFixture" Version="4.18.0" />
     <PackageReference Include="MartinCostello.Logging.XUnit" Version="0.3.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
     <PackageReference Include="NSubstitute" Version="5.0.0" />