fix workflow

Signed-off-by: Takeshi Yoneda <[email protected]>

Author: mathetake

.github/workflows/push-wasm-images.yaml

@@ -32,7 +32,7 @@ jobs:
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
-          password: ${{ secrets.GHCR_TOKEN }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build/Push Docker images
         run: make wasm_image.build_push