Update release workflow

Author: Externius

.github/workflows/main.yml

@@ -7,8 +7,8 @@ env:
 
 on:
   push:
-    branches:
-      - main
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
 
 permissions:
   contents: read
@@ -48,6 +48,18 @@ jobs:
           name: .net-app
           path: ${{env.DOTNET_ROOT}}/Open5ETools
 
+  github-release:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          tag_name: ${{ github.ref_name }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+
   deploy:
     runs-on: ubuntu-latest
     needs: build