chore: pin github actions to specific commit (#1216)

Author: jbroma

.github/workflows/test.yml

@@ -19,11 +19,11 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # tag=v4.2.2
+      - uses: pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda # tag=v4.1.0
 
       - name: Use Node.js ${{ matrix.node_version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # tag=v4.4.0
         with:
           node-version: ${{ matrix.node_version }}
           cache: 'pnpm'