Bump boto3 from 1.20.20 to 1.21.37

Bumps [boto3](https://github.com/boto/boto3) from 1.20.20 to 1.21.37.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](boto/boto3@1.20.20...1.21.37)

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

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

Author: dependabot[bot]

requirements/base.txt

@@ -16,5 +16,5 @@ django-storages==1.12.3
 
 drf-jwt==1.19.2
 
-boto3==1.20.20
+boto3==1.21.37
 attrs==21.4.0