chore(ci): update pnpm/action-setup action to v6

Author: renovate[bot]

.github/workflows/create-release-or-publish.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@v7
         with:
           ssh-key: ${{ secrets.DEPLOY_KEY }}
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 24

.github/workflows/pull-request.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 24