Fix spelling error: 'smaller than' -> 'smaller than' (pandas-dev#48114)

Fix spelling error

Author: ember91

pandas/core/config_init.py

@@ -262,7 +262,7 @@ def use_numba_cb(key) -> None:
 
 pc_chop_threshold_doc = """
 : float or None
-    if set to a float value, all float values smaller then the given threshold
+    if set to a float value, all float values smaller than the given threshold
     will be displayed as exactly 0 by repr and friends.
 """