Bump boto3 from 1.26.144 to 1.28.20

Bumps [boto3](https://github.com/boto/boto3) from 1.26.144 to 1.28.20.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](boto/boto3@1.26.144...1.28.20)

---
updated-dependencies:
- dependency-name: boto3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

src/requirements.txt

@@ -1,6 +1,6 @@
 asgiref==3.7.2
 attrs==23.1.0
-boto3==1.26.144
+boto3==1.28.20
 Django==3.2.19
 django-environ==0.10.0
 django-health-check==3.16.4