Pin GitHub Actions to full-length commit SHAs

Author: danfiedler-msft

.github/actions/smoke-test/action.yaml

@@ -9,7 +9,7 @@ runs:
   steps:
     - name: Checkout main
       id: checkout_release
-      uses: actions/checkout@v3
+      uses: actions/checkout@a37ce9120846195fa4ece8f58b268e6043cb2f26 # v3.7.0
 
     - name: Build template
       id: build_template

.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/release.yaml

@@ -7,10 +7,10 @@ jobs:
     if: ${{ github.ref == 'refs/heads/main' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@a37ce9120846195fa4ece8f58b268e6043cb2f26 # v3.7.0
 
       - name: "Publish Templates"
-        uses: devcontainers/action@v1
+        uses: devcontainers/action@1082abd5d2bf3a11abccba70eef98df068277772 # v1.4.3
         with:
           publish-templates: "true"
           base-path-to-templates: "./src"

.github/workflows/test-pr.yaml

@@ -8,7 +8,7 @@ jobs:
     outputs:
       templates: ${{ steps.filter.outputs.changes }}
     steps:
-      - uses: dorny/paths-filter@v2
+      - uses: dorny/paths-filter@4512585405083f25c027a35db413c2b3b9006d50 # v2.11.1
         id: filter
         with:
           filters: |
@@ -22,7 +22,7 @@ jobs:
       matrix:
         templates: ${{ fromJSON(needs.detect-changes.outputs.templates) }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@a37ce9120846195fa4ece8f58b268e6043cb2f26 # v3.7.0
 
       - name: Smoke test for '${{ matrix.templates }}'
         id: smoke_test