Update PR/develop action to cache pnpm files (#2671)

* Update PR/develop action to cache pnpm files

* Install pnpm before node

* empty commit for build speed testing

---------

Co-authored-by: Tim Welch <tim.j.welch@gmail.com>

.github/workflows/turf.yml

@@ -25,17 +25,17 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
-        with:
-          node-version: ${{ matrix.node-version }}
-
       - name: Install pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
-          version: 8
           run_install: false
 
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          cache: "pnpm"
+          node-version: ${{ matrix.node-version }}
+
       - run: pnpm install --frozen-lockfile
       - run: git diff --exit-code
       - run: pnpm test