ci: fix release workflow syntax and upgrade to action-gh-release@v3

Author: lewis617

.github/workflows/release.yml

@@ -29,11 +29,11 @@ jobs:
         run: npm run package
 
       - name: Create GitHub Release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
         with:
           files: releases/*.vsix
           draft: false
-          prerelease: "${{ contains(github.ref_name, 'alpha') || contains(github.ref_name, 'beta') || contains(github.ref_name, 'rc') }}"
+          prerelease: ${{ contains(github.ref_name, 'alpha') || contains(github.ref_name, 'beta') || contains(github.ref_name, 'rc') }}
           generate_release_notes: true
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}