Bump Microsoft.Extensions.Http.Polly from 6.0.7 to 6.0.8 (#1400)

Bumps [Microsoft.Extensions.Http.Polly](https://github.com/dotnet/aspnetcore) from 6.0.7 to 6.0.8.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v6.0.7...v6.0.8)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Http.Polly
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

samples/HealthChecks.UIAndApi/HealthChecks.UIAndApi.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.7" />
+    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.8" />
   </ItemGroup>
 
   <ItemGroup>

samples/HealthChecks.UIAndApiCustomization/HealthChecks.UIAndApiCustomization.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.7" />
+    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.8" />
   </ItemGroup>
 
   <ItemGroup>