Bump awscli from 1.20.14 to 1.21.7

Bumps [awscli](https://github.com/aws/aws-cli) from 1.20.14 to 1.21.7.
- [Release notes](https://github.com/aws/aws-cli/releases)
- [Changelog](https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst)
- [Commits](aws/aws-cli@1.20.14...1.21.7)

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

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

requirements/base.txt

@@ -15,7 +15,7 @@ Pillow==8.3.1
 icalendar==4.0.7
 dealer==2.1.0
 django-robots==4.0
-django-debug-toolbar==3.2.1
+django-debug-toolbar==3.2.2
 newspaper3k==0.2.8
 
 https://github.com/DemocracyClub/dc_signup_form/archive/refs/tags/2.1.1.tar.gz
@@ -28,5 +28,5 @@ feedparser==6.0.8
 sentry-sdk==1.3.1
 uk-election-timetables==2.2.2
 aws-sam-cli==1.27.2
-awscli==1.20.14
+awscli==1.21.7
 django-dotenv==1.4.2