chore: update pnpm action version

Author: ryoppippi

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/jekyll-build-pages@v1
 
       # pnpm
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v5
         with:
           run_install: false
       - name: build 2025

.github/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v5
         with:
           run_install: false
       - run: pnpm install --frozen-lockfile