Update CHANGES.rst

Co-authored-by: Andrew Murray <[email protected]>

Author: BaseMax

CHANGES.rst

@@ -3149,7 +3149,7 @@ Changelog (Pillow)
 - Change function declaration to match Tcl_CmdProc type #1966
   [homm]
 
-- Integer overflow checks on all calls to ``*alloc`` #1781
+- Integer overflow checks on all calls to \*alloc #1781
   [wiredfool]
 
 - Change equals method on Image so it short circuits #1967