Update App.css

to include phind logo dark css

Author: MustCodeAl

src/assets/App.css

@@ -413,6 +413,11 @@ a {
 .dark .blockHeaderWhite {
   color: white;
 }
+.dark .phindLogo {
+  fill: white;
+}
+
+
 .light .blockHeaderWhite {
   color: black;
 }