chore(deps): update pnpm/action-setup action to v4 (#53) [no ci]

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/deploy.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 18
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v4
         name: Install pnpm
         id: pnpm-install
         with:

.github/workflows/pr.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 18
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@v4
         name: Install pnpm
         id: pnpm-install
         with: