Merge pull request #28 from ikura-hamu/fix/shell_script

🐛 シェルスクリプトの修正

.github/workflows/pre-release.yml

@@ -29,6 +29,6 @@ jobs:
       - name: Check doc diff
         shell: bash
         run: |
-          if [[ -n $(git status --porcelain) ]]; then
+          if [ -n $(git status --porcelain) ]; then
             exit 1
           fi