chore: use pnpm version specified in package.json

Author: nikgraf

.github/workflows/checks.yaml

@@ -18,9 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v3
-        with:
-          version: 9
+      - uses: pnpm/action-setup@v4
 
       - uses: actions/setup-node@v4
         with:
@@ -37,17 +35,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v3
-        with:
-          version: 9
+      - uses: pnpm/action-setup@v4
 
       - uses: actions/setup-node@v4
         with:
           node-version-file: 'package.json'
           cache: 'pnpm'
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile 
+        run: pnpm install --frozen-lockfile
 
       - name: Test
         run: pnpm test
@@ -57,9 +53,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v3
-        with:
-          version: 9
+      - uses: pnpm/action-setup@v4
 
       - uses: actions/setup-node@v4
         with: