Docs - Grammar fix #40377 (#40381)

* Doc fix in groupby/apply.py

* Doc fix in groupby/apply.py

Author: Mayurji

pandas/core/groupby/groupby.py

@@ -328,7 +328,7 @@ class providing the base-class of operations.
 engine : str, default None
     * ``'cython'`` : Runs the function through C-extensions from cython.
     * ``'numba'`` : Runs the function through JIT compiled code from numba.
-    * ``None`` : Defaults to ``'cython'`` or globally setting ``compute.use_numba``
+    * ``None`` : Defaults to ``'cython'`` or the global setting ``compute.use_numba``
 
     .. versionadded:: 1.1.0
 engine_kwargs : dict, default None