Bump mercurial from 6.3.3 to 6.4.4 (#3526)

Bumps [mercurial](https://mercurial-scm.org/) from 6.3.3 to 6.4.4.

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

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

requirements.txt

@@ -6,7 +6,7 @@ libmozdata==0.2.3
 lmdb==1.4.1
 markdown2==2.4.8
 matplotlib==3.7.1
-mercurial==6.3.3
+mercurial==6.4.4
 microannotate==0.0.24
 mozci==2.3.0
 numpy==1.22.4