Bump numpy from 1.26.0 to 1.26.3 (#186)

Bumps [numpy](https://github.com/numpy/numpy) from 1.26.0 to 1.26.3.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/RELEASE_WALKTHROUGH.rst)
- [Commits](numpy/numpy@v1.26.0...v1.26.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/requirements/base.txt

@@ -43,7 +43,7 @@ django-anymail==10.0  # https://github.com/anymail/django-anymail
 django-autocomplete-light==3.9.7  # https://github.com/yourlabs/django-autocomplete-light
 django-avatar==7.1.1
 
-numpy==1.26.0
+numpy==1.26.3
 matplotlib==3.7.1
 django-mptt==0.14.0  # https://github.com/django-mptt/django-mptt
 django-webpack-loader==2.0.1