Update README.md

Author: olblak

README.md

@@ -34,12 +34,12 @@ jobs:
         with:
           command: diff
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          UPDATECLI_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Apply
         uses: updatecli/updatecli-action@v1
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          UPDATECLI_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
 
 ## License