[StepSecurity] Apply security best practices

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily

.github/workflows/defender-for-devops.yml

@@ -32,16 +32,21 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-dotnet@v3
+    - name: Harden Runner
+      uses: step-security/harden-runner@a4aa98b93cab29d9b1101a6143fb8bce00e2eac4 # v2.7.1
+      with:
+        egress-policy: audit
+
+    - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+    - uses: actions/setup-dotnet@3447fd6a9f9e57506b15f895c5b76d3b197dc7c2 # v3.2.0
       with:
         dotnet-version: |
           5.0.x
           6.0.x
     - name: Run Microsoft Security DevOps
-      uses: microsoft/[email protected]
+      uses: microsoft/security-devops-action@e94440350ed10e2806d47cd0d7504a2c51abdbe9 # v1.6.0
       id: msdo
     - name: Upload results to Security tab
-      uses: github/codeql-action/upload-sarif@v2
+      uses: github/codeql-action/upload-sarif@ceaec5c11a131e0d282ff3b6f095917d234caace # v2.25.3
       with:
         sarif_file: ${{ steps.msdo.outputs.sarifFile }}