Update GitHub Artifact Actions

Author: renovate[bot]

.github/workflows/main_bod-roadmapreport.yml

@@ -28,7 +28,7 @@ jobs:
         run: dotnet publish -c Release -o ${{env.DOTNET_ROOT}}/myapp
 
       - name: Upload artifact for deployment job
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
         with:
           name: .net-app
           path: ${{env.DOTNET_ROOT}}/myapp
@@ -44,7 +44,7 @@ jobs:
 
     steps:
       - name: Download artifact from build job
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
         with:
           name: .net-app