fixed button color

Former-commit-id: 9669f14e24b50f97f5fa907db635f287624eaebe

extension/ui/pages/pendings.css

@@ -123,7 +123,7 @@ header button {
     }
 
     .result-cancel button {
-        color: #fdfdfd;
+        color: #202023;
     }
 
     button:not([disabled]):hover {