build(ci): merge tag and main ghcr build release file (oras-project#1205)

Signed-off-by: Billy Zha <[email protected]>
Signed-off-by: Feynman Zhou <[email protected]>

Author: qweeah

.github/workflows/release-ghcr-main.yml

@@ -15,8 +15,8 @@ name: release-ghcr
 
 on:
   push:
-    tags:
-      - v*
+    tags: [v*]
+    branches: [main]
 
 jobs:
   build:
@@ -26,18 +26,14 @@ jobs:
       packages: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: prepare
         id: prepare
         run: |
-          VERSION=${GITHUB_REF#refs/*/}
-          BRANCH_NAME=${GITHUB_REF#refs/heads/}
-          if [[ "${VERSION}" == "${BRANCH_NAME}" ]]; then
-            VERSION=$(git rev-parse --short HEAD)
-          fi
-          echo "ref=ghcr.io/${{ github.repository }}:${VERSION}" >> $GITHUB_OUTPUT
+          TAG=${GITHUB_REF#refs/*/} # get branch or tag as image tag
+          echo "ref=ghcr.io/${{ github.repository }}:${TAG}" >> $GITHUB_OUTPUT
       - name: docker login
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}