build(deps): Bump soupsieve from 2.5 to 2.8.4

Bumps [soupsieve](https://github.com/facelessuser/soupsieve) from 2.5 to 2.8.4.
- [Release notes](https://github.com/facelessuser/soupsieve/releases)
- [Commits](facelessuser/soupsieve@2.5...2.8.4)

---
updated-dependencies:
- dependency-name: soupsieve
  dependency-version: 2.8.4
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements-docs.txt

@@ -13,7 +13,7 @@ packaging==25.0
 pygments==2.20.0
 requests==2.33.0
 snowballstemmer==2.2.0
-soupsieve==2.5
+soupsieve==2.8.4
 sphinx==7.1.2
 sphinx-basic-ng==1.0.0b2
 sphinxcontrib-applehelp==1.0.4