chore: DEVPLAT-7373 fix Node.js 20 deprecated GitHub Actions

Author: kristianmills

.github/workflows/release-on-merge.yml

@@ -13,7 +13,7 @@ jobs:
     concurrency: ${{ github.ref }}
     steps:
       - uses: actions/checkout@v6
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v5
         with:
           version: 7.6.0
       - uses: actions/setup-node@v6