Bump opencolorio from 2.5.0 to 2.5.1 in /docs

Bumps [opencolorio](https://github.com/AcademySoftwareFoundation/OpenColorIO) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/AcademySoftwareFoundation/OpenColorIO/releases)
- [Changelog](https://github.com/AcademySoftwareFoundation/OpenColorIO/blob/main/CHANGELOG.md)
- [Commits](AcademySoftwareFoundation/OpenColorIO@v2.5.0...v2.5.1)

---
updated-dependencies:
- dependency-name: opencolorio
  dependency-version: 2.5.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -19,7 +19,7 @@ networkx==3.4.2 ; python_full_version < '3.11'
 networkx==3.5 ; python_full_version >= '3.11'
 numpy==2.2.6 ; python_full_version < '3.11'
 numpy==2.3.3 ; python_full_version >= '3.11'
-opencolorio==2.5.0
+opencolorio==2.5.1
 packaging==25.0
 pillow==11.3.0
 pydata-sphinx-theme==0.16.1