add comment

Author: iritkatriel

Include/internal/pycore_magic_number.h

@@ -272,6 +272,7 @@ Known values:
     Python 3.14a6 3617 (Branch monitoring for async for loops)
     Python 3.14a6 3618 (Add oparg to END_ASYNC_FOR)
     Python 3.14a6 3619 (Renumber RESUME opcode from 149 to 128)
+    Python 3.14a6 3620 (Optimize bytecode for all/any/tuple called on a genexp)
 
     Python 3.15 will start with 3650