ci: fixed staging ci (#119)

Signed-off-by: Tomer Figenblat <tfigenbl@redhat.com>

Author: TomerFi

.github/workflows/stage.yml

@@ -44,6 +44,9 @@ jobs:
     needs: build
     if: github.repository == 'redhat-developer/intellij-dependency-analytics'
     steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
       - name: Download distribution artifacts
         uses: actions/download-artifact@v3
         with: