Pin every action to latest SHA (#10779)

Co-authored-by: Eric Bailey <git@esb.lol>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

.github/workflows/verify-pnpm-lock.yml

@@ -6,13 +6,16 @@ concurrency:
   group: "${{ github.workflow }}-${{ github.head_ref || github.ref }}"
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   verify-pnpm-lock:
     name: No manual pnpm-lock.yaml edits
     runs-on: ubuntu-latest
     steps:
       - name: Check out PR HEAD
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
@@ -21,10 +24,10 @@ jobs:
           BASE_REF: ${{ github.base_ref }}
         run: git fetch origin $BASE_REF --depth=1
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: Install node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json