chore(deps): bump soupsieve from 2.8.4 to 2.9 in /docs (#6181)

Bumps [soupsieve](https://github.com/facelessuser/soupsieve) from 2.8.4 to 2.9.
- [Release notes](https://github.com/facelessuser/soupsieve/releases)
- [Commits](https://github.com/facelessuser/soupsieve/compare/2.8.4...2.9)

---
updated-dependencies:
- dependency-name: soupsieve
  dependency-version: '2.9'
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

diff --git a/docs/requirements.txt b/docs/requirements.txt
index d743ff4..75f083e 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -51,7 +51,7 @@
     # via sphinx
 snowballstemmer==2.2.0
     # via sphinx
-soupsieve==2.8.4
+soupsieve==2.9
     # via beautifulsoup4
 sphinx==7.2.6
     # via