Pin GitHub Actions to full-length commit SHAs (#5580)

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-test.yml

@@ -25,13 +25,13 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Checkout PowerShellEditorServices
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           repository: PowerShell/PowerShellEditorServices
           path: PowerShellEditorServices
 
       - name: Checkout vscode-powershell
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           path: vscode-powershell
 
@@ -41,7 +41,7 @@ jobs:
         working-directory: vscode-powershell
 
       - name: Install dotnet
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@26b0ec14cb23fa6904739307f278c14f94c95bf1 # v5.4.0
         with:
           cache: true
           cache-dependency-path: PowerShellEditorServices/**/*.csproj
@@ -52,7 +52,7 @@ jobs:
         shell: pwsh
         run: ./vscode-powershell/tools/installPSResources.ps1
 
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version: 22
           cache: npm
@@ -75,7 +75,7 @@ jobs:
         working-directory: vscode-powershell
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         if: always()
         with:
           # archive: false uploads the .vsix directly (no zip wrapper) using the filename as the artifact name
@@ -84,7 +84,7 @@ jobs:
           if-no-files-found: ignore
 
       - name: Upload test results
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         if: always()
         with:
           name: vscode-powershell-test-results-${{ matrix.os }}