add missing git-clone to the deploy step in the release process (#8243)

* add missing git-clone to the deploy step in the release process

Author: d-a-v

.github/workflows/release-to-publish.yml

@@ -36,6 +36,10 @@ jobs:
       run:
         shell: bash
     steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: false
+        fetch-depth: 0
     - name: Deploy updated JSON
       run: |
            bash ./package/deploy_package_index.sh

package/deploy_package_index.sh

@@ -16,7 +16,7 @@ pushd esp8266.github.io
 
 # Copy from published release, ensure JSON valid
 rm -f stable/package_esp8266com_index.json
-wget "https://github.com/esp8266/Arduino/releases/download/$tag/package_esp8266com_index.json" -O stable/package_esp8266com_index.json
+wget "https://github.com/esp8266/Arduino/releases/download/"$tag"/package_esp8266com_index.json" -O stable/package_esp8266com_index.json
 cat stable/package_esp8266com_index.json | jq empty
 
 git add stable/package_esp8266com_index.json