Update rstcheck and enable additional features

Author: mmerklinger

requirements.txt

@@ -12,7 +12,7 @@ MarkupSafe==3.0.2
 packaging==24.2
 Pygments==2.18.0
 requests==2.32.3
-rstcheck==6.2.4
+rstcheck [sphinx,toml] ==6.2.5
 snowballstemmer==2.2.0
 soupsieve==2.6
 Sphinx==8.1.3