[tosa_mlir_translator] Update serialization lib githash

This patch updates the serialization lib githash to include:

23f755a [serialization_lib] update tosa_serializer.py
30b9ca8 [serialization_lib] update README.md
199425b Set warnings as errors
a24fbe5 [serialization_lib] Add Op Info
9e3b662 Avoid supplying unsupported linker flags
877c7ff Use portable type with random engine
b22b01d Apply hardened flags to test/gtest subdir and fixed the warnings
565b58c Update save_npy/load_npy, add STORAGE_MAP & get_tosa_dtype_mapping
d149525 [ser lib] Remove incompatible hardened flags
5e240c6 [SDL] Remove SDL banned functions
9254a9e Set CMP0135 to improve FetchContent cache
5a85d26 Remove expected_return_code in desc.json
fba6f8d Add SECURITY.md to list third-party dependencies
e8be475 Remove Git submodules
1fadda4 Avoid explicit new

Signed-off-by: Tai Ly <tai.ly@arm.com>
Change-Id: Ib26761e3c362069d768893ebaf96ca33c763bce2