ci: bun pm for pkg-pr-new

stackblitz-labs/pkg.pr.new#398

Author: ryoppippi

.github/workflows/ci.yaml

@@ -43,7 +43,7 @@ jobs:
         with:
           bun-version: latest
       - run: bun install --frozen-lockfile
-      - run: bunx pkg-pr-new publish
+      - run: bunx pkg-pr-new publish --bun
 
   spell-check:
     runs-on: ubuntu-latest