Disambiguate the parameter required to encrypt secrets (#778)

docs/authoring_apps.md

@@ -57,7 +57,7 @@ Many apps need secret values like API keys. When publishing your app to the [Tid
 To encrypt values, use the `pixlet encrypt` command. For example:
 
 ```shell
-# replace "googletraffic" with the folder name of your app in the community repo
+# replace "googletraffic" with the packageName of your app in the community repo
 $ pixlet encrypt googletraffic top_secret_google_api_key_123456
 "AV6+...."  # encrypted value
 ```
@@ -97,4 +97,4 @@ Some apps may take a long time to render, particularly if they produce a long an
 $ pixlet profile path_to_your_app.star
 ```
 
-When you profile your app, it will print a list of the functions which consume the most CPU time. Improving these will have the biggest impact on overall run time.
+When you profile your app, it will print a list of the functions which consume the most CPU time. Improving these will have the biggest impact on overall run time.