Bump numpy from 1.23.3 to 1.23.4

Bumps [numpy](https://github.com/numpy/numpy) from 1.23.3 to 1.23.4.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/RELEASE_WALKTHROUGH.rst)
- [Commits](https://github.com/numpy/numpy/compare/v1.23.3...v1.23.4)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-numpy==1.23.3
+numpy==1.23.4
 pandas==1.5.0; platform_machine != 'armv7l'
 # Piwheels doesn't have 1.5.0 yet.
 pandas==1.4.3; platform_machine == 'armv7l'