CB/ui: fix tertiary button (codeberg-dark) (!54)

makes the "Regenerate Secret" button on the OAuth2 application edit page more legible

Reviewed-on: https://codeberg.org/Codeberg/forgejo/pulls/54
Co-authored-by: crystal <[email protected]>
Co-committed-by: crystal <[email protected]>

Author: crystal

web_src/less/themes/codeberg/dark-variables.less

@@ -125,6 +125,12 @@
 .ui.green.button:hover, .ui.green.buttons .button:hover {
     background-color: #16ab39
 }
+.ui.tertiary.button {
+    color: #fff9;
+    &:hover {
+        color: #ccc;
+    }
+}
 
 /** TODO: ??? **/
 .tag-code, .tag-code td {