Bump fontawesomefree from 6.2.1 to 6.5.1

Bumps [fontawesomefree](https://github.com/FortAwesome/Font-Awesome) from 6.2.1 to 6.5.1.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/6.x/CHANGELOG.md)
- [Commits](FortAwesome/Font-Awesome@6.2.1...6.5.1)

---
updated-dependencies:
- dependency-name: fontawesomefree
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

requirements/requirements.txt

@@ -91,7 +91,7 @@ django-tree-queries==0.16.1
     # via -r requirements/requirements.in
 fastobo==0.12.2
     # via pronto
-fontawesomefree==6.2.1
+fontawesomefree==6.5.1
     # via django-anvil-consortium-manager
 google-auth==2.25.2
     # via django-anvil-consortium-manager