build(deps): update conllu requirement from <5.0.0,>=4.0 to >=4.0,<7.0.0

Updates the requirements on [conllu](https://github.com/EmilStenstrom/conllu) to permit the latest version.
- [Commits](EmilStenstrom/conllu@4.5.3...6.0.0)

---
updated-dependencies:
- dependency-name: conllu
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 boto3>=1.20.27
-conllu>=4.0,<5.0.0
+conllu>=4.0,<7.0.0
 deprecated>=1.2.13
 ftfy>=6.1.0
 gdown>=4.4.0