ci: optional previews for dependabot (#128)

Author: AuHau

.github/workflows/check.yaml

@@ -65,12 +65,13 @@ jobs:
 
       - name: Create preview
         uses: ethersphere/beeload-action@v1
+        continue-on-error: true
         with:
           bee-url: https://unlimited.gateway.ethswarm.org
           preview: 'true'
           token: ${{ secrets.REPO_GHA_PAT }}
           extra-params: '-H "${{ secrets.GATEWAY_AUTHORIZATION_HEADER }}"'
-          
+
       - name: Upload to testnet
         uses: ethersphere/beeload-action@v1
         with: