[Version] Bump product versions after Xcode 13 release (#12782)

Make.versions

@@ -48,8 +48,8 @@
 #   line changed in git).
 #
 
-IOS_PACKAGE_VERSION=14.99.0.$(IOS_COMMIT_DISTANCE)
-MAC_PACKAGE_VERSION=7.99.0.$(MAC_COMMIT_DISTANCE)
+IOS_PACKAGE_VERSION=15.1.0.$(IOS_COMMIT_DISTANCE)
+MAC_PACKAGE_VERSION=8.1.0.$(MAC_COMMIT_DISTANCE)
 
 #
 # ** NuGet package version numbers **