Bump sphinx from 8.0.2 to 8.1.3

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 8.0.2 to 8.1.3.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v8.0.2...v8.1.3)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -54,16 +54,14 @@ snowballstemmer==2.2.0
     # via sphinx
 soupsieve==2.5
     # via beautifulsoup4
-sphinx==8.0.2
+sphinx==8.1.3
     # via
     #   -r requirements.in
     #   furo
     #   myst-parser
     #   sphinx-basic-ng
     #   sphinx-design
     #   sphinxcontrib-applehelp
-    #   sphinxcontrib-devhelp
-    #   sphinxcontrib-htmlhelp
     #   sphinxcontrib-qthelp
     #   sphinxcontrib-serializinghtml
 sphinx-basic-ng==1.0.0b2
@@ -72,9 +70,9 @@ sphinx-design==0.6.1
     # via -r requirements.in
 sphinxcontrib-applehelp==1.0.7
     # via sphinx
-sphinxcontrib-devhelp==1.0.5
+sphinxcontrib-devhelp==2.0.0
     # via sphinx
-sphinxcontrib-htmlhelp==2.0.4
+sphinxcontrib-htmlhelp==2.1.0
     # via sphinx
 sphinxcontrib-jsmath==1.0.1
     # via sphinx