Update reference

Author: torhakon

.github/workflows/buildAndPublish.yml

@@ -38,7 +38,7 @@ jobs:
           echo "${yellow}Checking if there has been changes to source code by running git diff on the src folder excluding markdown files${reset}"
 
           if [ ${{ github.event_name == 'pull_request' }} ]; then
-            changes=$(git diff ${{ github.event.pull_request.base.ref }}..${{ github.sha }} --ignore-all-space --name-only -- src/)
+            changes=$(git diff ${{ github.event.pull_request.base.ref }}..${{ github.event.pull_request.head.sha }} --ignore-all-space --name-only -- src/)
           else
             changes=$(git diff "${{ github.ref_name }}^" "${{ github.ref_name }}" --ignore-all-space --name-only -- src/)
           fi