build(deps): update lightning-utilities requirement in /requirements

Updates the requirements on [lightning-utilities](https://github.com/Lightning-AI/utilities) to permit the latest version.
- [Release notes](https://github.com/Lightning-AI/utilities/releases)
- [Changelog](https://github.com/Lightning-AI/utilities/blob/main/CHANGELOG.md)
- [Commits](Lightning-AI/utilities@v0.11.1...v0.15.0)

---
updated-dependencies:
- dependency-name: lightning-utilities
  dependency-version: 0.15.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/docs.txt

@@ -17,7 +17,7 @@ sphinx-rtd-dark-mode
 sphinxcontrib-video ==0.4.1
 jinja2 <3.2.0
 
-lightning-utilities >=0.11.1, <0.15.0
+lightning-utilities >=0.11.1, <0.16.0
 
 # installed from S3 location and fetched in advance
 lai-sphinx-theme

requirements/fabric/base.txt

@@ -5,4 +5,4 @@ torch >=2.1.0, <2.8.0
 fsspec[http] >=2022.5.0, <2025.8.0
 packaging >=20.0, <=25.0
 typing-extensions >=4.5.0, <4.15.0
-lightning-utilities >=0.10.0, <0.15.0
+lightning-utilities >=0.10.0, <0.16.0

requirements/pytorch/base.txt

@@ -8,4 +8,4 @@ fsspec[http] >=2022.5.0, <2025.8.0
 torchmetrics >0.7.0, <1.8.0
 packaging >=20.0, <=25.0
 typing-extensions >=4.5.0, <4.15.0
-lightning-utilities >=0.10.0, <0.15.0
+lightning-utilities >=0.10.0, <0.16.0