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

Author: renovate[bot]

packages/ember-simple-auth/.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 7
       - name: Install Node
@@ -41,7 +41,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 7
       - uses: actions/setup-node@v4
@@ -74,7 +74,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 7
       - name: Install Node