feat(website): dim flowchart node labels for better contrast

Author: Rel1cx

apps/website/app/overrides.css

@@ -1,3 +1,7 @@
+[aria-roledescription="flowchart-v2"] span.nodeLabel {
+  filter: brightness(0.5);
+}
+
 .bsky-post [class^="embed-module_externalThumbnail"] {
   display: none;
-}
+}