fix example

Author: m-murasovs

apify-api/openapi/code_samples/javascript/act_runs_post.js

@@ -5,6 +5,6 @@ const apifyClient = new ApifyClient({
 });
 const run = await apifyClient
     .actor('<ACTOR ID>')
-    .start({ /** <ACTOR INPUT> */ });
+    .start({ foo: 'bar' });
 
 console.log(run);