Fix link from index

templates/index.html

@@ -12,7 +12,7 @@
 <div class="index_content_holder">
     <img class="profile_pic" id="profile_pic" src="{{ url_for('static', filename='profile_pic.jpg') }}">
     <h1>Ferenc Schulcz</h1>
-    <h2>Go <a href="{{ url_for('cv') }}">read my CV</a></h2>
+    <h2>Go <a href="{{ url_for('service', servicename='about') }}">read my introduction</a></h2>
     <h2>Or check these out</h2>
     <div class="grid">
         <a href="https://kszk.bme.hu/">