[build] Restore the NuGet prerelease identifier/branch to the ones from 'main'.

Make.config

@@ -140,8 +140,8 @@ endif
 ##
 ## Note that the prerelease identifier should be as short as possible, because otherwise
 ## the resulting package name can become too long for MSIs.
-NUGET_HARDCODED_PRERELEASE_IDENTIFIER=xcode16
-NUGET_HARDCODED_PRERELEASE_BRANCH=xcode16
+NUGET_HARDCODED_PRERELEASE_IDENTIFIER=net8-rtm
+NUGET_HARDCODED_PRERELEASE_BRANCH=net8.0
 
 # compute the alphanumeric version of branch names
 NUGET_RELEASE_BRANCH_ALPHANUMERIC:=$(shell export LANG=C; printf "%s" "$(NUGET_RELEASE_BRANCH)" | tr -c '[a-zA-Z0-9-]' '-')