fix: uses checksum action from github-actions repository

Author: JBAhire

.github/workflows/merge-publish.yml

@@ -17,7 +17,7 @@ jobs:
           submodules: recursive
 
       - name: create checksum file
-        uses: hypertrace/actions/checksum@main
+        uses: hypertrace/github-actions/checksum@main
 
       - name: Cache packages
         uses: actions/cache@v2