Fix filename in example snippet (#1627)

Author: ignasi35

dhall-try/index.html

@@ -486,7 +486,7 @@ <h1 class="display-4">Use programming language features</h1>
 
     input.setValue(example0);
 
-    h0.setValue(`-- ./example.dhall
+    h0.setValue(`-- ./company.dhall
 
 let Prelude =
       https://prelude.dhall-lang.org/v11.1.0/package.dhall sha256:99462c205117931c0919f155a6046aec140c70fb8876d208c7c77027ab19c2fa