docs: fix simple typo, unpredicatable -> unpredictable

There is a small typo in src/PIL/Image.py.

Should read `unpredictable` rather than `unpredicatable`.

Signed-off-by: Tim Gates <[email protected]>

Author: timgates42

src/PIL/Image.py

@@ -646,7 +646,7 @@ def __repr__(self):
     def _repr_pretty_(self, p, cycle):
         """IPython plain text display support"""
 
-        # Same as __repr__ but without unpredicatable id(self),
+        # Same as __repr__ but without unpredictable id(self),
         # to keep Jupyter notebook `text/plain` output stable.
         p.text(
             "<%s.%s image mode=%s size=%dx%d>"