docs/reference/mpyfiles: Document change in .mpy sub-version.

Signed-off-by: Damien George <damien@micropython.org>

Author: dpgeorge

docs/reference/mpyfiles.rst

@@ -86,7 +86,8 @@ and .mpy version.
 =================== ============
 MicroPython release .mpy version
 =================== ============
-v1.22.0 and up      6.2
+v1.23.0 and up      6.3
+v1.22.x             6.2
 v1.20 - v1.21.0     6.1
 v1.19.x             6
 v1.12 - v1.18       5
@@ -102,6 +103,7 @@ MicroPython repository at which the .mpy version was changed.
 =================== ========================================
 .mpy version change Git commit
 =================== ========================================
+6.2 to 6.3          bdbc869f9ea200c0d28b2bc7bfb60acd9d884e1b
 6.1 to 6.2          6967ff3c581a66f73e9f3d78975f47528db39980
 6 to 6.1            d94141e1473aebae0d3c63aeaa8397651ad6fa01
 5 to 6              f2040bfc7ee033e48acef9f289790f3b4e6b74e5