creares release workflow and change build workflow to run on PR

.github/workflows/build.yml

@@ -1,8 +1,6 @@
 name: Build
 
-on:
-  push:
-    branches: main
+on: [pull_request]
 
 jobs:
   build:
@@ -66,21 +64,3 @@ jobs:
             dist/*.tar.gz
             dist/*.yml
             dist/*.blockmap
-
-      - name: Release
-        uses: softprops/action-gh-release@v1
-        with:
-          draft: true
-          files: |
-            dist/*.exe
-            dist/*.zip
-            dist/*.dmg
-            dist/*.AppImage
-            dist/*.snap
-            dist/*.deb
-            dist/*.rpm
-            dist/*.tar.gz
-            dist/*.yml
-            dist/*.blockmap
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}