Fix typo

Author: stefannibrasil

app/views/reports/annual_reports/index.html.erb

@@ -25,7 +25,7 @@
     <div class="row">
       <div class="col-md-12 mb-2">
         <h5 class="mb-1">Reports are available at the end of every year.</h5>
-        <span class="text-muted"> <%= "#{@actual_year} (available in #{available_date})" %> </span>
+        <span class="text-muted"> <%= "#{@actual_year} (available on #{available_date})" %> </span>
       </div>
       <div class="col-md-12">
         <div class="card card-primary">