Bump mozci from 2.3.4 to 2.4.0 (#4000)

Bumps [mozci]() from 2.3.4 to 2.4.0.

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

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

requirements.txt

@@ -8,7 +8,7 @@ markdown2==2.4.12
 matplotlib==3.8.2
 mercurial==6.5.3
 microannotate==0.0.24
-mozci==2.3.4
+mozci==2.4.0
 numpy==1.26.3
 orjson==3.9.12
 ortools==9.8.3296