Bump libmozdata from 0.2.4 to 0.2.6 (#4346)

Bumps [libmozdata](https://github.com/mozilla/libmozdata) from 0.2.4 to 0.2.6.
- [Release notes](https://github.com/mozilla/libmozdata/releases)
- [Commits](https://github.com/mozilla/libmozdata/compare/v0.2.4...v0.2.6)

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

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

requirements.txt

@@ -5,7 +5,7 @@ imbalanced-learn==0.12.3
 langchain==0.2.10
 langchain-community==0.2.7
 langchain-openai==0.1.16
-libmozdata==0.2.4
+libmozdata==0.2.6
 lmdb==1.5.1
 lxml-html-clean==0.1.1
 markdown2==2.5.0