py-numpy: updated to 1.26.4

NumPy 1.26.4 is a maintenance release that fixes bugs and regressions
discovered after the 1.26.3 release. The Python versions supported by this
release are 3.9-3.12. This is the last planned release in the 1.26.x series.

BUG: Restore missing asstr import
MAINT: prepare 1.26.x for further development
BUG: ``numpy.array_api``: fix ``linalg.cholesky`` upper decomp...
CI: Bump azure pipeline timeout to 120 minutes
MAINT, BLD: Fix unused inline functions warnings on clang
BLD: include fix for MinGW platform detection
TST: Fix test_numeric on riscv64
BLD: fix building for windows ARM64
MAINT: add ``newaxis`` to ``__all__`` in ``numpy.array_api``
BUG: Use large file fallocate on 32 bit linux platforms
TST: Fix test_warning_calls on Python 3.12
TST: Bump pytz to 2023.3.post1
BUG: Fix AVX512 build flags on Intel Classic Compiler
BLD: fix potential issue with escape sequences in ``__config__.py``
CI: pin cygwin python to 3.9.16-1 and fix typing tests [skip...
MAINT: Bump cibuildwheel to v2.16.4
BLD: unvendor meson-python on 1.26.x and upgrade to meson-python...
MAINT: Include header defining backtrace
BUG: Fix np.quantile([Fraction(2,1)], 0.5)

(adam)