Add link to PR number when running workflow.

.github/workflows/zephyr-hal.yml

@@ -78,5 +78,5 @@ jobs:
  git config --global user.email "actions@github.com"
  git config --global user.name "GitHub Actions"
  git add *
- git commit -m "Update Zephyr MSDK Hal based on MSDK PR# ${PR_NUM}"
+ git commit -m "Update Zephyr MSDK Hal based on MSDK PR: https://github.com/analogdevicesinc/msdk/pull/${PR_NUM}"
  git push