build(deps): bump libmozdata from 0.2.6 to 0.2.7 in /bot (#2319)

Bumps [libmozdata](https://github.com/mozilla/libmozdata) from 0.2.6 to 0.2.7.
- [Release notes](https://github.com/mozilla/libmozdata/releases)
- [Commits](https://github.com/mozilla/libmozdata/compare/v0.2.6...v0.2.7)

---
updated-dependencies:
- dependency-name: libmozdata
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

bot/requirements.txt

@@ -1,5 +1,5 @@
 -e ../tools #egg=code-review-tools
 influxdb==5.3.2
-libmozdata==0.2.6
+libmozdata==0.2.7
 python-hglib==2.6.2
 pyyaml==6.0.1