Fixed typo in docstring (#4326)

OliverDew · web-flow · commit cbe4d5f952e0 · 2021-04-12T13:40:10.000+02:00
diff --git a/strings/lower.py b/strings/lower.py
@@ -1,6 +1,6 @@
 def lower(word: str) -> str:
     """
-    Will convert the entire string to lowecase letters
+    Will convert the entire string to lowercase letters
 
     >>> lower("wow")
     'wow'
