don't publish the snap if it's a pull request (#795)

* don't publish the snap if it's a pull request

* update deps

.github/workflows/snap.yml

@@ -19,20 +19,21 @@ jobs:
       fail-fast: false
     steps:
       - name: Checkout Git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
       - name: Build Snap
         uses: snapcore/action-build@v1
         id: snapcraft-build
         with:
           snapcraft-args: "-v"
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: denaro-amd64-snap
           path: ${{ steps.snapcraft-build.outputs.snap }} 
       - name: Upload and release Denaro Snap
         uses: snapcore/action-publish@v1
+        if: ${{ github.event_name != 'pull_request' }}
         env:
           SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.STORE_LOGIN }}
         with: