Add Note for character limit of function path in events (#1189)

* Add Note for character limit of function path in events

* Update README.md

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Co-authored-by: monkut <shane.cousins@gmail.com>

Author: DilLip-Chowdary-Codes

README.md

@@ -255,6 +255,8 @@ Zappa can be used to easily schedule functions to occur on regular intervals. Th
 These functions will be packaged and deployed along with your `app_function` and called from the handler automatically.
 Just list your functions and the expression to schedule them using [cron or rate syntax](http://docs.aws.amazon.com/lambda/latest/dg/tutorial-scheduled-events-schedule-expressions.html) in your _zappa_settings.json_ file:
 
+**Note:** `function` path cannot exceed 64 characters.
+
 ```javascript
 {
     "production": {