build(deps): bump pymdown-extensions in /hack/mkdocs/image (#3878)

Bumps [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) from 10.14.3 to 10.16.
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@10.14.3...10.16)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-version: '10.16'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

hack/mkdocs/image/requirements.txt

@@ -16,7 +16,7 @@ mkdocs-mermaid2-plugin==1.2.1
 pandas>=2.0.3
 pep562==1.1
 Pygments==2.19.1
-pymdown-extensions==10.14.3
+pymdown-extensions==10.16
 PyYAML==6.0.2
 six==1.17.0
 tabulate==0.9.0