Update call-outbound.mdx

added section for sample CSV batch calling along with path for sample file download

Author: kyle-vapi

fern/calls/call-outbound.mdx

@@ -58,6 +58,8 @@ When you schedule a call, we will save the Assistant, Phone Number, and Customer
 
 To call more than one number at a time, use the [`customers`](/api-reference/calls/create#request.body.customers) parameter to pass an array of `customer`. To provide customer specific assistant overrides, please call the endpoint separately for each destination number.
 
+You can also batch call a list of numbers using the [`example template`](/assets/batch-sample.csv). The required fields are the phone number and name columns, and any dynamic variable you add after that is optional. 
+
 Use both `customers` and `schedulePlan` together to schedule batched calls.
 
 ```jsx
@@ -84,4 +86,4 @@ Note: Vapi free numbers have limited number of outbound calls per day. Import a
   It is a violation of FCC law to dial phone numbers without consent in an
   automated manner. See [Telemarketing Sales
   Rule](/glossary#telemarketing-sales-rule) to learn more.
-</Warning>
+</Warning>