fix: CI調整

Author: ntkrgk

.github/workflows/gem-push.yml

@@ -26,8 +26,8 @@ jobs:
         with:
           java-version: 1.8
       - name: push gem
-        uses: trocco-io/push-gem-to-gpr-action@v1
+        uses: trocco-io/push-gem-to-gpr-action@v2
         with:
           language: java
-          gem-path: "./pkg/*.gem"
+          gem-path: "./build/gems/*.gem"
           github-token: "${{ secrets.GITHUB_TOKEN }}"