chore(deps): update pnpm/action-setup action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         node: [16, 17, 18, 20, 22]
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v4
         with:
           version: 8
       - uses: actions/setup-node@v4

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v4
         with:
           version: 8
       - uses: actions/setup-node@v4