Bump Microsoft.Extensions.Caching.Memory from 7.0.0 to 8.0.0 (#75)

Bumps [Microsoft.Extensions.Caching.Memory](https://github.com/dotnet/runtime) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.0...v8.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Caching.Memory
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/FastCache.Benchmarks/FastCache.Benchmarks.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="CacheManager.Core" Version="1.2.0" />
     <PackageReference Include="CacheManager.Microsoft.Extensions.Caching.Memory" Version="1.2.0" />
     <PackageReference Include="LazyCache" Version="2.4.0" />
-    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="8.0.0" />
     <PackageReference Include="RangeExtensions" Version="2.1.1" />
     <PackageReference Include="ZiggyCreatures.FusionCache" Version="0.24.0" />
   </ItemGroup>