Bump Polyfill from 9.6.0 to 9.7.0#61

SimonCropp merged 1 commit intomainVerifyTests/Verify.OpenXml:mainfrom

dependabot/nuget/src/Polyfill-9.7.0VerifyTests/Verify.OpenXml:dependabot/nuget/src/Polyfill-9.7.0Copy head branch name to clipboard