[CI] Disable non-lazy string operation on logging (#4326)

Co-authored-by: Danny Guinther <dguinther@neuralmagic.com>

docs/source/conf.py

@@ -98,9 +98,10 @@ autodoc_mock_imports = [
 for mock_target in autodoc_mock_imports:
     if mock_target in sys.modules:
         logger.info(
-            f"Potentially problematic mock target ({mock_target}) found; "
+            "Potentially problematic mock target (%s) found; "
             "autodoc_mock_imports cannot mock modules that have already "
-            "been loaded into sys.modules when the sphinx build starts.")
+            "been loaded into sys.modules when the sphinx build starts.",
+            mock_target)
 
 
 class MockedClassDocumenter(autodoc.ClassDocumenter):