[chore] attempt to apply gh workaround (#12134)

This following the workaround suggested in
cli/cli#6485

Fixes
#12129

---------

Signed-off-by: Alex Boten <[email protected]>

Author: codeboten

.github/workflows/scripts/release-prepare-release.sh

@@ -39,11 +39,11 @@ if [ "${CANDIDATE_BETA}" != "" ]; then
     COMMANDS+="
 - make prepare-release PREVIOUS_VERSION=${CURRENT_BETA_ESCAPED} RELEASE_CANDIDATE=${CANDIDATE_BETA} MODSET=beta"
 fi
-git push origin "${BRANCH}"
+git push --set-upstream origin "${BRANCH}"
 
 # Use OpenTelemetryBot account to create PR, allowing workflows to run
 # The title must match the checks in check-merge-freeze.yml
-gh pr create --title "[chore] Prepare release ${RELEASE_VERSION}" --body "
+gh pr create --head "$(git branch --show-current)" --title "[chore] Prepare release ${RELEASE_VERSION}" --body "
 The following commands were run to prepare this release:
 ${COMMANDS}
 "