Update traitlets requirement from <5.10.0,>=5.3.0 to >=5.3.0,<5.12.0 …

…in /requirements (Lightning-AI#18753)

Update traitlets requirement in /requirements

Updates the requirements on [traitlets](https://github.com/ipython/traitlets) to permit the latest version.
- [Release notes](https://github.com/ipython/traitlets/releases)
- [Changelog](https://github.com/ipython/traitlets/blob/main/CHANGELOG.md)
- [Commits](ipython/traitlets@5.3.0...v5.11.2)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>

requirements/app/app.txt

@@ -4,7 +4,7 @@ typing-extensions >=4.4.0, <4.8.0
 deepdiff >=5.7.0, <6.6.0
 fsspec[http] >=2022.5.0, <2023.11.0
 croniter >=1.3.0, <1.5.0  # strict; TODO: for now until we find something more robust.
-traitlets >=5.3.0, <5.10.0
+traitlets >=5.3.0, <5.12.0
 arrow >=1.2.0, <1.3.0
 lightning-utilities >=0.8.0, <0.10.0
 beautifulsoup4 >=4.8.0, <4.13.0