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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -777,7 +777,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
     - name: Install pnpm
-      uses: pnpm/action-setup@v5
+      uses: pnpm/action-setup@v6
       with:
         version: 10
     - name: Use Node.js ${{ matrix.node-version }}

.github/workflows/gravity.yml

@@ -14,7 +14,7 @@ jobs:
       github.event.workflow_run.conclusion == 'success'
     steps:
       - uses: actions/checkout@v5
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
         with:
           version: 10
       - uses: actions/download-artifact@v8