Pin GitHub Actions to full-length commit SHAs (#5937)

Author: danfiedler-msft

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      github-actions:
+        patterns: ["*"]
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
           mkdir -p $HOME/.rush-user
           @{ buildCacheFolder = Join-Path ${{ github.workspace }} rush-cache } | ConvertTo-Json > $HOME/.rush-user/settings.json
 
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           fetch-depth: 2
           path: repo-a
@@ -59,7 +59,7 @@ jobs:
           git config --local user.email "rushbot@users.noreply.github.com"
         working-directory: repo-a
 
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version: ${{ matrix.NodeVersion }}
 
@@ -99,7 +99,7 @@ jobs:
         working-directory: repo-a
 
       - name: Clone another copy of the repo to test the build cache
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
         with:
           fetch-depth: 1
           path: repo-b

.github/workflows/file-doc-tickets.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Use nodejs
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version: 20
       - name: Parse PR body