chore(deps): update dependency pymdown-extensions to v10.15 (#22811)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/requirements.txt

@@ -6,4 +6,4 @@ markdown_include==0.8.1
 pygments==2.19.1
 jinja2==3.1.6
 markdown==3.8
-pymdown-extensions==10.14.3
+pymdown-extensions==10.15