bpo-45837: Note tiltangle is not deprecated, it's really settiltangle (GH-29629)

diff --git a/Lib/turtle.py b/Lib/turtle.py
index 7e36c2c..f3b320b 100644
--- a/Lib/turtle.py
+++ b/Lib/turtle.py
@@ -2877,7 +2877,8 @@ def tiltangle(self, angle=None):
         between the orientation of the turtleshape and the heading of the
         turtle (its direction of movement).
 
-        Deprecated since Python 3.1
+        (Incorrectly marked as deprecated since Python 3.1, it is really
+        settiltangle that is deprecated.)
 
         Examples (for a Turtle instance named turtle):
         >>> turtle.shape("circle")