CI: avoid redudant build when making new release

Signed-off-by: Tianling Shen <i@cnsztl.eu.org>

.github/workflows/ci.yml

@@ -8,13 +8,10 @@ on:
   pull_request:
     paths-ignore:
       - '**.md'
-  release:
-    types:
-      - published
 
 jobs:
   build:
-    name: Test ${{ matrix.arch }}
+    name: Build ${{ matrix.arch }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -76,14 +73,14 @@ jobs:
 
       - name: Store packages
         uses: actions/upload-artifact@v3
-        if: github.event_name != 'release'
+        if: "!startsWith(github.ref, 'refs/tags/v')"
         with:
           name: ${{ matrix.arch}}-${{ github.sha}}-packages
           path: "*.ipk"
 
       - name: Upload packages
         uses: svenstaro/upload-release-action@v2
-        if: github.event_name == 'release'
+        if: "startsWith(github.ref, 'refs/tags/v')"
         with:
           repo_token: ${{ github.token }}
           file: "*.ipk"