Bump Microsoft.AspNetCore.All from 2.1.4 to 2.1.21 in /tests/SingleStoreConnector.Performance#4

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dependabot/nuget/tests/SingleStoreConnector.Performance/Microsoft.AspNetCore.All-2.1.21memsql/SingleStoreNETConnector:dependabot/nuget/tests/SingleStoreConnector.Performance/Microsoft.AspNetCore.All-2.1.21Copy head branch name to clipboard