Added code copy colors

Author: cwhite911

theme.scss

@@ -231,6 +231,11 @@ $code-block-bg: $gs-grey-light-color;
 $code-keyword-color: $gs-primary-color;
 $code-string-color: $gs-primary-color;
 
+/* Code Copy
+-----------------------------------------------------------------------------*/
+$btn-code-copy-color: $gs-secondary-alt-color;
+$btn-code-copy-color-active: $gs-secondary-color;
+
 /* Callouts
 Quarto Docs: https: //quarto.org/docs/authoring/callouts.html
 -----------------------------------------------------------------------------*/