chore: update GitHub Actions to use commit hashes (#2)

.github/workflows/ci-validation.yml

@@ -32,10 +32,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
 
       - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@v2
+        uses: microsoft/setup-msbuild@6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce  # v2.0.0
 
       - name: Install Windows Driver Kit (IddCx headers)
         shell: pwsh
@@ -140,7 +140,7 @@ jobs:
           Copy-Item "$outDir\*" -Destination $dest -Recurse -Force
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4.6.2
         with:
           name: VDD-${{ matrix.platform }}-${{ env.BUILD_CONFIGURATION }}
           path: artifacts/VDD/${{ matrix.platform }}/