ci: login to ghcr

.github/workflows/release.yml

@@ -1,4 +1,4 @@
-name: Earthly snapshot
+name: Earthly release
 on:
   push:
     tags:
@@ -12,5 +12,11 @@ jobs:
       - uses: actions/checkout@v4
       - name: Download latest earthly
         run: "sudo /bin/sh -c 'wget https://github.com/earthly/earthly/releases/download/v0.8.6/earthly-linux-amd64 -O /usr/local/bin/earthly && chmod +x /usr/local/bin/earthly'"
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Run earthly
         run: earthly --ci --push +ci --SNAPSHOT=false --GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}