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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 'lts/*'

.github/workflows/publish.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 24