style: make speakers page 3 per row (graphql#1486)

Author: YassinEldeeb

src/assets/css/global.css

@@ -1,3 +1,7 @@
 /*@tailwind base;*/
 @tailwind components;
 @tailwind utilities;
+
+.override-prose-w-with-85ch {
+  max-width: 83ch;
+}

src/pages/conf/program.tsx

@@ -10,8 +10,9 @@ export default () => {
   return (
     <LayoutConf>
       <HeaderConf />
+
       <div className="bg-white">
-        <div className="prose lg:prose-lg mx-auto py-10 max-sm:px-4">
+        <div className="prose lg:prose-lg mx-auto py-10 max-sm:px-4 override-prose-w-with-85ch">
           <h1>GraphQLConf 2023 Program</h1>
           <section className="px-0 my-8">
             <h4>September 19-21, 2023 I San Francisco Bay Area, CA</h4>