Change specificty for theme css variables [skip ci]

Fixes #1960

Author: PEZ

CHANGELOG.md

@@ -7,6 +7,7 @@ Changes to Calva.
 - Fix: [The indenter fails matching cljfmt rules on qualified symbols](https://github.com/BetterThanTomorrow/calva/issues/1956)
 - [Add info about cider-nrepl docs to calva.io/connect](https://github.com/BetterThanTomorrow/calva/issues/1955)
 - [Inform about Calva version on startup](https://github.com/BetterThanTomorrow/calva/issues/1954)
+- Fix: [Calva docs site theme color not used](https://github.com/BetterThanTomorrow/calva/issues/1960)
 
 ## [2.0.318] - 2022-11-08
 

docs/site/stylesheets/extra.css

@@ -1,4 +1,4 @@
-:root {
+[data-md-color-scheme="default"] {
     --md-primary-fg-color: rgb(219, 149, 80);
     --md-accent-fg-color: rgb(144, 180, 254);
 }