fix post-release

.github/workflows/go.yml

@@ -304,16 +304,6 @@ jobs:
   post-release:
     runs-on: ubuntu-latest
     needs: go-release
-
-    env:
-      NODE_VERSION: "21"
-      NPM_REGISTRY_URL: "https://registry.npmjs.org"
-
-    defaults:
-      run:
-        shell: bash
-        working-directory: ./pkgs/npm
-
     steps:
       - name: Update Windows s.defang.io/defang_win_amd64.zip short link
         run: |
@@ -350,10 +340,12 @@ jobs:
       - name: Install node
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ env.NODE_VERSION }}
-          registry-url: ${{ env.NPM_REGISTRY_URL }}
+          node-version: "20" # same as the version in flake.nix
+          registry-url: https://registry.npmjs.org
 
       - name: Publish to NPM
+        shell: bash
+        working-directory: ./pkgs/npm
         run: |
           # Get version number without the 'v'
           export version_number=`echo "${{ github.ref_name }}" | cut -c2- `