build(deps): update sphinxcontrib-mermaid requirement from <1 to <2

Updates the requirements on [sphinxcontrib-mermaid](https://github.com/mgaitan/sphinxcontrib-mermaid) to permit the latest version.
- [Changelog](https://github.com/mgaitan/sphinxcontrib-mermaid/blob/master/CHANGELOG.rst)
- [Commits](mgaitan/sphinxcontrib-mermaid@0.1...1.0.0)

---
updated-dependencies:
- dependency-name: sphinxcontrib-mermaid
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/documentation.txt

@@ -6,6 +6,6 @@ sphinx-autodoc-typehints>=2.2.2,<2.6
 sphinx-click>=5
 sphinx-copybutton<1
 sphinx-design>=0.5,<1
-sphinxcontrib-mermaid<1
+sphinxcontrib-mermaid<2
 sphinxext-opengraph>=0.9
 sphinx-sitemap>=2.4,<3