Bump Microsoft.AspNetCore.TestHost from 8.0.20 to 8.0.21#90

dependabot[bot] wants to merge 1 commit intomainopen-policy-agent/opa-aspnetcore:mainfrom

dependabot/nuget/test/OpenPolicyAgent.Opa.AspNetCore.Tests/Microsoft.AspNetCore.TestHost-8.0.21open-policy-agent/opa-aspnetcore:dependabot/nuget/test/OpenPolicyAgent.Opa.AspNetCore.Tests/Microsoft.AspNetCore.TestHost-8.0.21Copy head branch name to clipboard