fix typos in inline comment

Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>

Author: jorenham

src/PIL/Image.py

@@ -91,7 +91,7 @@ class DecompressionBombError(Exception):
 if TYPE_CHECKING:
     from . import _imaging
 
-    # mypy will not recognize `core` as public symbol when import as
+    # mypy will not recognize `core` as a public symbol when imported as
     # `from . import _imaging as core`
     core = _imaging
 else: