[skip changelog] Add small delay to test

Author: silvanocerza

test/test_core.py

@@ -455,6 +455,10 @@ def test_core_upgrade_removes_unused_tools(run_command, data_dir):
     # Upgrades core
     assert run_command("core upgrade arduino:avr")
 
+    import time
+
+    time.sleep(1)
+
     # Verifies tool is uninstalled since it's not used by newer core version
     assert not tool_path.exists()