Merge pull request #15 from mug-jp/Kanahiro-patch-1

Update demo.yml

Author: Kanahiro

.github/workflows/demo.yml

@@ -26,6 +26,9 @@ jobs:
                   node-version: 22
                   cache: 'pnpm'
 
+            - name: install pnpm
+              run: npm install -g pnpm
+
             - name: install
               run: pnpm install