github actions: Fetch the github scripts from main

Otherwise, creating the pull request fails because the scripts are not present
in that specific branch.

Signed-off-by: Roxana Nicolescu <rnicolescu@ciq.com>

Author: roxanan1996

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

@@ -481,6 +481,12 @@ jobs:
           git log -1 $commit --format=%B | awk 'BEGIN{print "```"} /^$/{empty++} empty==2{exit} {print} END{print "```"}' >> /tmp/commit_message.txt
         done
 
+    - name: Fetch PR body script from main
+      run: |
+        git fetch origin main:main
+        git checkout origin/main -- .github/scripts/create-pr-body.sh
+        chmod +x .github/scripts/create-pr-body.sh
+
     - name: Create Pull Request
       env:
         GH_TOKEN: ${{ secrets.PRIVATE_REPO_ACCESS_TOKEN }}
@@ -514,7 +520,6 @@ jobs:
         fi
 
         # Create PR body using script
-        chmod +x .github/scripts/create-pr-body.sh
         .github/scripts/create-pr-body.sh \
           "${{ steps.build_info.outputs.build_time }}" \
           "${{ steps.build_info.outputs.total_time }}" \