Slight friendlier texts

templates/500.html

@@ -6,9 +6,9 @@
 
 <div style="text-align: center;">
     <img src="//scipost.org/static/scipost/images/logo_scipost_RGB_HTML_groot.png" alt="SciPost logo" width="240" style="margin-top: 20px; margin-bottom: 20px" />
-    <h1>The server responded with an error.</h1>
+    <h1>We are sorry, something went wrong.</h1>
     <h2>500</h2>
-    <h3>We are sorry, something went wrong. The SciPost administrators have been informed.</h3>
+    <h3>The SciPost administrators have been informed.</h3>
     <p style="margin-top: 20px;">Go back to <a href="//scipost.org">the homepage</a>.</p>
 </div>