Fixed CI.

Author: andrey-serdyuk

.github/workflows/ci.yml

@@ -26,7 +26,23 @@ jobs:
           dotnet-version: '9.0.304'
 
       - name: Prepare NuGet.config (GitHub Packages + nuget.org)
-        run: dotnet nuget list source --configfile ./nuget.config
+        run: |
+          cat > ./nuget.config <<'EOF'
+          <?xml version="1.0" encoding="utf-8"?>
+          <configuration>
+            <packageSources>
+              <add key="github" value="https://nuget.pkg.github.com/${{ github.repository_owner }}/index.json" />
+              <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+            </packageSources>
+            <packageSourceCredentials>
+              <github>
+                <add key="Username" value="${{ github.actor }}" />
+                <add key="ClearTextPassword" value="${{ secrets.GITHUB_TOKEN }}" />
+              </github>
+            </packageSourceCredentials>
+          </configuration>
+          EOF
+          dotnet nuget list source --configfile ./nuget.config
 
       - name: Set VERSION suffix for CI
         run: echo "VERSION_SUFFIX=-ci-$(date +'%Y%m%d%H%M%S').${{ github.run_number }}" >> $GITHUB_ENV