ci: fix release step on created release

Author: rxri

.github/workflows/build.yml

@@ -9,6 +9,8 @@ on:
     branches:
       - main
       - "*/main/**"
+  release:
+    types: [published]
 
 jobs:
   build:
@@ -43,7 +45,7 @@ jobs:
         os: ["linux", "darwin", "windows"]
         arch: ["amd64", "arm64", "386"]
     runs-on: ubuntu-latest
-    if: startsWith(github.ref, 'refs/tags/')
+    if: startsWith(github.ref, 'refs/tags/v2')
     needs: build
 
     steps: