Use target branch name into the PR subject line

Signed-off-by: Shreeya Patel <spatel@ciq.com>

Author: shreeya-patel98

.github/workflows/kernel-build-and-test-x86_64.yml

@@ -512,13 +512,13 @@ jobs:
         if [ -n "$EXISTING_PR" ]; then
           echo "PR #$EXISTING_PR already exists, updating it"
           gh pr edit "$EXISTING_PR" \
-            --title "[${{ github.ref_name }}] ${{ steps.commit_msg.outputs.commit_subject }}" \
+            --title "[$BASE_BRANCH] ${{ steps.commit_msg.outputs.commit_subject }}" \
             --body-file pr_body.md
         else
           echo "Creating new PR from ${{ github.ref_name }} to $BASE_BRANCH"
           gh pr create \
             --base "$BASE_BRANCH" \
             --head "${{ github.ref_name }}" \
-            --title "[${{ github.ref_name }}] ${{ steps.commit_msg.outputs.commit_subject }}" \
+            --title "[$BASE_BRANCH] ${{ steps.commit_msg.outputs.commit_subject }}" \
             --body-file pr_body.md
         fi