build(deps): require mkdocs-material-ekgf 0.0.21

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jgeluk

pyproject.toml

@@ -30,7 +30,7 @@ dependencies = [
   "pillow",
   "cairosvg",
   "ekg-lib>=0.0.30",
-  "mkdocs-material-ekgf>=0.0.20",
+  "mkdocs-material-ekgf>=0.0.21",
   "playwright>=1.57.0",
 ]