We recently released the 9.7.0 version of packages in this repository, so we now need to update the msbuild property PackageValidationBaselineVersion to point to 9.7.0 so we ensure that we don't make api breaking changes from that release. Also, I believe it is currently set to a property ApiCompatBaselineVersion which is not really used anywhere else, so if that is confirmed, we should just remove that property from the repo and instead just set PackageValidationBaselineVersion to 9.7.0 directly.