English Language mistake fixed fossi-foundation#12

I have fixed the English Language mistake on home page

index.html

@@ -109,7 +109,7 @@ <h5 class="card-header">Registration</h5>
 		  <div class="card">
 		    <div class="card-body">
 		      <h5 class="card-title">Free Ticket</h5>
-		      <p>ORConf is <strong>free to attend</strong>! We require that you register so so we know how many to expect.</p>
+		      <p>ORConf is <strong>free to attend</strong>! We require that you register so we know how many to expect.</p>
                       <div class="d-flex justify-content-center mb-2 mt-2">
 			<form action="https://forms.gle/Q8YcCeNCPwgF5nGu5" target="_blank">
 			<form action="https://forms.gle/Q8YcCeNCPwgF5nGu5" target="_blank">