Update fontawesomefree requirement from ~=6.4.2 to ~=6.5.1

Updates the requirements on [fontawesomefree](https://github.com/FortAwesome/Font-Awesome) to permit the latest version.
- [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@6.4.2...6.5.1)

---
updated-dependencies:
- dependency-name: fontawesomefree
  dependency-type: direct:production
...

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

requirements.txt

@@ -24,7 +24,7 @@ django-storages~=1.14
 django-environ==0.11.2
 drf-spectacular[sidecar]==0.26.5
 easy-thumbnails==2.8.5
-fontawesomefree~=6.4.2
+fontawesomefree~=6.5.1
 icalendar==5.0.11
 invoke==2.2.0
 openfoodfacts==0.1.12