fix: pass token via oci-registry-password for GHCR auth

The devcontainers/cli OCI client needs explicit credentials via
oci-registry-password rather than relying on env-only auth.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: bradleybeddoes

.github/workflows/publish-feature.yml

@@ -14,18 +14,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Login to GHCR
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
       - name: Publish to GHCR
         uses: devcontainers/action@v1
         with:
           publish-features: "true"
           base-path-to-features: "./features"
           generate-docs: "true"
+          oci-registry-password: ${{ secrets.GITHUB_TOKEN }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}