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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 20
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
         with:
           run_install: false
       - name: Get pnpm store directory

.github/workflows/deploy.yml

@@ -36,7 +36,7 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 20
-      - uses: pnpm/action-setup@v4
+      - uses: pnpm/action-setup@v6
         with:
           run_install: false
       - name: Get pnpm store directory