fix: dark-light-mode-button-icon-github (tomalaforge#977)

Author: Tenessy

docs/src/components/github/SignUp.svelte

@@ -53,6 +53,11 @@
  background-color: #218838;
  }
 
+ a :global(svg) {
+ --sl-icon-color: initial;
+ }
+
+
  @media (width < 450px) {
  .github-sign-in {
  display: none;