Update build.yml

Author: syntaxerror247

.github/workflows/build.yml

@@ -51,6 +51,14 @@ jobs:
           path: |
             ~/.local/share/godot/export_templates/
 
+      - name: Upload debug source template
+        uses: actions/upload-artifact@v4
+        with:
+          name: android_source_debug.zip
+          path: ~/.local/share/godot/export_templates/${{ env.GODOT_VERSION }}.${{ env.GODOT_RELEASE }}/android_debug.apk
+          if-no-files-found: ignore
+          retention-days: 28
+
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with: