use sphink reference

Author: MarcoGorelli

spec/API_specification/dataframe_api/dataframe_object.py

@@ -213,7 +213,7 @@ def insert_columns(self, locs_and_columns: Sequence[tuple[int, Column[Any]]]) ->
         """
         Insert columns into DataFrame at specified locations.
 
-        Like `insert_column`, but can insert multiple (independent) columns.
+        Like :meth:`insert_column`, but can insert multiple (independent) columns.
         Some implementations may be able to make use of parallelism in this
         case. For example instead of: