Fix typo in turtle deprecation warning and use warnings._deprecated (#91862)

Lib/turtle.py

@@ -2863,10 +2863,10 @@ def settiltangle(self, angle):
         >>> turtle.stamp()
         >>> turtle.fd(50)
         """
-        warnings.warn("turtle.RawTurtle.settiltangle() is deprecated since "
-                      "Python 3.1 and scheduled for removal in Python 3.13."
-                      "Use tiltangle() instead.",
-                       DeprecationWarning)
+        warnings._deprecated("turtle.RawTurtle.settiltangle()",
+                             "{name!r} is deprecated since Python 3.1 and scheduled "
+                             "for removal in Python {remove}. Use tiltangle() instead.",
+                             remove=(3, 13))
         self.tiltangle(angle)
 
     def tiltangle(self, angle=None):