fix grammar in desc

Author: Bot

public/index.html

@@ -8,18 +8,18 @@
     <link rel="icon" type="image/png" sizes="96x96" href="<%= BASE_URL %>favicon-96.png">
     <link rel="icon" type="image/png" sizes="192x192"  href="<%= BASE_URL %>favicon-192.png">
 
-    <meta name="description" content="33 languages. Detailed statistics. Multiplayer support. Don't waste your time on correcting typos. Improve your typing skills now!">
+    <meta name="description" content="33 languages. Detailed statistics. Multiplayer support. Don't waste your time correcting typos. Improve your typing skills now!">
 
     <meta property="og:type" content="website">
     <meta property="og:url" content="https://coderush.xyz/">
     <meta property="og:title" content="CodeRush - the best typing test for programmers">
-    <meta property="og:description" content="30 languages. Detailed statistics. Multiplayer support. Don't waste your time on correcting typos. Improve your typing skills now!">
+    <meta property="og:description" content="30 languages. Detailed statistics. Multiplayer support. Don't waste your time correcting typos. Improve your typing skills now!">
     <meta property="og:image" content="<%= BASE_URL %>thumbnail.jpg">
 
     <meta property="twitter:card" content="summary_large_image">
     <meta property="twitter:url" content="https://coderush.xyz/">
     <meta property="twitter:title" content="CodeRush - the best typing test for programmers">
-    <meta property="twitter:description" content="30 languages. Detailed statistics. Multiplayer support. Don't waste your time on correcting typos. Improve your typing skills now!">
+    <meta property="twitter:description" content="30 languages. Detailed statistics. Multiplayer support. Don't waste your time correcting typos. Improve your typing skills now!">
     <meta property="twitter:image" content="<%= BASE_URL %>thumbnail.jpg">
 
     <meta name="google-site-verification" content="PkPp5p5FZeYE0LhLxYM6bvTCGwCQSDJLo8BfdjtucmA" />