Bump sphinxcontrib-confluencebuilder from 2.5.2 to 2.6.0

Bumps [sphinxcontrib-confluencebuilder](https://github.com/sphinx-contrib/confluencebuilder) from 2.5.2 to 2.6.0.
- [Release notes](https://github.com/sphinx-contrib/confluencebuilder/releases)
- [Changelog](https://github.com/sphinx-contrib/confluencebuilder/blob/main/CHANGES.rst)
- [Commits](sphinx-contrib/confluencebuilder@v2.5.2...v2.6)

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

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

requirements.doctools.txt

@@ -1,3 +1,3 @@
 myst-parser==3.0.1
 sphinxcontrib-mermaid==0.9.2
-sphinxcontrib.confluencebuilder==2.5.2
+sphinxcontrib.confluencebuilder==2.6.0