ci: migrate to swarm actions for previews (#137)

Author: vojtechsimetka

.github/workflows/check.yaml

@@ -64,15 +64,18 @@ jobs:
           npx link-checker --url-ignore localhost --allow-hash-href --mkdocs --http-cache /tmp/link-checker --http-always-get --http-timeout 10000 --http-redirects 5 ./build
 
       - name: Create preview
-        uses: ethersphere/beeload-action@v1
-        continue-on-error: true
+        uses: ethersphere/swarm-actions/pr-preview@v0
         with:
           bee-url: https://unlimited.gateway.ethswarm.org
-          preview: 'true'
           token: ${{ secrets.REPO_GHA_PAT }}
-          extra-params: '-H "${{ secrets.GATEWAY_AUTHORIZATION_HEADER }}"'
+          error-document: index.html
+          headers: "${{ secrets.GATEWAY_AUTHORIZATION_HEADER }}"
 
       - name: Upload to testnet
-        uses: ethersphere/beeload-action@v1
+        uses: ethersphere/swarm-actions/upload-dir@v0
+        continue-on-error: true
         with:
+          index-document: index.html
+          error-document: index.html
+          dir: ./build
           bee-url: https://api.gateway.testnet.ethswarm.org