chore(deps): pin pnpm/action-setup action to a7487c7

Author: renovate[bot]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v4 # v4.0.0
+        uses: pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda # v4
 
       - name: Install node.js v22
         uses: actions/setup-node@1e60f620b9541d16bece96c5465dc8ee9832be0b # v4.0.3