Fix some typos

Author: arekpaterak

_data/agenda.yml

@@ -9,7 +9,7 @@
         time: 31 October, 18:00
 
       - title: "Exhibition"
-        subtitle: Free entrence, no registration required
+        subtitle: Free entrance, no registration required
         element-class: col-lg-12
         time: 1 November - 11 November, every day between 10:00 - 18:00
 

_includes/home/about.html

@@ -3,7 +3,7 @@
         <div class="row">
             <div class="col-lg-12">
                 <p style="margin: 0">
-                    The paritcipation in the Festival is <strong>free of charge</strong>.
+                    The participation in the Festival is <strong>free of charge</strong>.
                     To register for specific events, please <strong>see the <a class="page-scroll" style="color: white;" href="#agenda">agenda</a> below</strong>.
                 </p>
             </div>