Tailor the Asana OAuth help URI

Summary: Ref T2852. Asana supports a link directly to this panel, I just wasn't able to find it.

Test Plan:
Clicked the link and got to the apps panel.

{F47346}

Reviewers: isaac_asana, btrahan, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2852

Differential Revision: https://secure.phabricator.com/D6285

src/applications/auth/provider/PhabricatorAuthProviderOAuthAsana.php

@@ -12,11 +12,11 @@ final class PhabricatorAuthProviderOAuthAsana
     $login_uri = $this->getLoginURI();
 
     return pht(
-      "To configure Asana OAuth, create a new application by logging in to ".
-      "Asana and going to **Account Settings**, then **Apps**, then ".
-      "**Add New Application**.".
+      "To configure Asana OAuth, create a new application here:".
       "\n\n".
-      "Use these settings:".
+      "https://app.asana.com/-/account_api".
+      "\n\n".
+      "When creating your application, use these settings:".
       "\n\n".
       "  - **App URL:** Set this to: `%s`\n".
       "  - **Redirect URL:** Set this to: `%s`".