[noissue]: Update sphinx requirement from ~=6.2.1 to ~=7.2.5

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v6.2.1...v7.2.5)

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

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

doc_requirements.txt

@@ -6,7 +6,7 @@
 # For more info visit https://github.com/pulp/plugin_template
 -r requirements.txt
 plantuml
-sphinx~=6.2.1
+sphinx~=7.2.5
 sphinx-rtd-theme==1.2.0
 sphinxcontrib-jquery
 sphinxcontrib-openapi