lib/micropython-lib: Update submodule to latest.

This brings in:
- sdcard: Send stop bit after multi-block read/write
- sdcard: Compute CRC7 for all SPI commands
- sdcard: Add read/write speed test to sdtest
- lsm6dsox: Add pedometer support
- lsm6dsox: Add pedometer example code
- unix-ffi/re: Handle PCRE2_UNSET in group and groups methods
- unix-ffi/re: Add tests for empty string match in ffi regex
- unix-ffi/machine: Retrieve a unique identifier if one is known
- senml/docs: Correct capitalization of 'MicroPython'
- unix-ffi/_libc: Extend FreeBSD libc versions range
- string: Convert string module to package and import templatelib

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

Author: dpgeorge