Docs theme switch fix (#2810)

* Fix the theme switch label in mkdocs

Signed-off-by: Mario Sarcher <mario@sarcher.de>

mkdocs.yml

@@ -62,11 +62,11 @@ theme:
     - scheme: slate
       toggle:
         icon: material/toggle-switch-off-outline
-        name: Switch to light mode
+        name: Switch to dark mode
     - scheme: default
       toggle:
         icon: material/toggle-switch
-        name: Switch to dark mode
+        name: Switch to light mode
   features:
     - toc.autohide
     - search.suggest