[StepSecurity] ci: Harden GitHub Actions (#27202)

Signed-off-by: StepSecurity Bot <bot@stepsecurity.io>

.github/workflows/copilot-setup-steps.yml

@@ -10,6 +10,9 @@ on:
     paths:
       - ".github/workflows/copilot-setup-steps.yml"
 
+permissions:
+  contents: read
+
 jobs:
   # The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
   # See https://docs.github.com/en/copilot/customizing-copilot/customizing-the-development-environment-for-copilot-coding-agent

.github/workflows/windows-packaging-reusable.yml

@@ -13,6 +13,9 @@ env:
   SYSTEM_ARTIFACTSDIRECTORY: ${{ github.workspace }}/artifacts
   BUILD_ARTIFACTSTAGINGDIRECTORY: ${{ github.workspace }}/artifacts
 
+permissions:
+  contents: read
+
 jobs:
   package:
     name: ${{ matrix.architecture }} - ${{ matrix.channel }}

.github/workflows/xunit-tests.yml

@@ -14,6 +14,9 @@ on:
         required: false
         default: testResults-xunit
 
+permissions:
+  contents: read
+
 jobs:
   xunit:
     name: Run xUnit Tests