Bump emoji from 2.5.0 to 2.7.0 in /docs

Bumps [emoji](https://github.com/carpedm20/emoji) from 2.5.0 to 2.7.0.
- [Release notes](https://github.com/carpedm20/emoji/releases)
- [Changelog](https://github.com/carpedm20/emoji/blob/master/CHANGES.md)
- [Commits](carpedm20/emoji@v2.5.0...v2.7.0)

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

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

docs/requirements.txt

@@ -1,7 +1,7 @@
 poetry==1.5.1
 
 # Documentation building
-emoji==2.5.0
+emoji==2.7.0
 importlib-metadata==6.8.0
 myst-parser==1.0.0
 pygments==2.15.1