fix: update CI workflow to only run releases on tags

Author: vinitkumar

.github/workflows/ci.yml

@@ -43,10 +43,37 @@ jobs:
         name: pdf-joiner
         path: pdf-joiner
 
+  snapshot:
+    name: Snapshot Build
+    needs: [test, build]
+    if: github.ref == 'refs/heads/main'
+    runs-on: macos-latest
+    permissions:
+      contents: write
+      packages: write
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.24.3'
+
+    - name: Run GoReleaser Snapshot
+      uses: goreleaser/goreleaser-action@v5
+      with:
+        distribution: goreleaser
+        version: latest
+        args: release --snapshot --clean --skip-validate
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
   release:
     name: Release
     needs: [test, build]
-    if: startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main'
+    if: startsWith(github.ref, 'refs/tags/v')
     runs-on: macos-latest
     permissions:
       contents: write