Change font weight of sensitive button to 500 (mastodon#10682)

Author: Gargron

app/javascript/styles/mastodon/components.scss

@@ -267,6 +267,11 @@
   &__sensitive-button {
     padding: 10px;
     padding-top: 0;
+
+    .icon-button {
+      font-size: 14px;
+      font-weight: 500;
+    }
   }
 
   .compose-form__warning {