Tweak styles

Author: hasparus

src/components/index-page/what-is-graphql/api-gateway-query.mdx

@@ -1,9 +1,10 @@
 ```graphql
-{
-  project(name: "GraphQL") {
-    tagline
-    contributors {
-      name
+query getCity($city: String) {
+  cities(name: $city) {
+    population
+    weather {
+      temperature
+      precipitation
     }
   }
 }

src/components/index-page/what-is-graphql/wires.tsx

@@ -493,6 +493,8 @@ export function Wires({ className }: { className?: string }) {
     return () => animate?.removeEventListener("repeatEvent", inc)
   }, [])
 
+  // todo: highlight the lines in step 3
+
   return (
     <div className={clsx(className, "relative", classes.wires)}>
       <svg