Added github authentication to the integration workflow

.github/workflows/continuous-integration-dotnet.yml

@@ -84,10 +84,13 @@ jobs:
 
       - name: Install SonarCloud scanners
         run: dotnet tool install --global dotnet-sonarscanner
-
+        
       - name: Install dotnet reportgenerator
         run: dotnet tool install --global dotnet-reportgenerator-globaltool
 
+      - name: Add nuget package source
+        run: dotnet nuget add source --username USERNAME --password ${{ secrets.GITHUB_TOKEN }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/DFE-Digital/index.json"
+
       - name: Restore dependencies
         run: dotnet restore ConcernsCaseWork/ConcernsCaseWork.sln