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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Install pnpm
-        uses: pnpm/action-setup@v5
+        uses: pnpm/action-setup@v6
 
       - name: Set node version to 22
         uses: actions/setup-node@v6

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
 
       - name: Set node version to 22
         uses: actions/setup-node@v6