ci(build_publish_image): remove git config, unused

.github/workflows/build_publish_image_release.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Extract image name and confirm it is a valid semantic version tag
         id: extract_tag
         run: |
-          set -x
+          set -x # show commands
 
           # Extract the tag name
           TAG_NAME=$(echo ${{ github.ref }} | sed 's/refs\/tags\///')
@@ -53,7 +53,4 @@ jobs:
           set -e # abort on error
           set -x # show commands
 
-          git config --global user.name 'wikibase suite github actions bot'
-          git config --global user.email '[email protected]'
-
           ./nx release publish -p $IMAGE_NAME