docs: update generated_resources.rst (#1114)

Author: khamaileon

docs/internals/generated_resources.rst

@@ -5,7 +5,7 @@ CloudFormation Resources Generated By SAM
   :local:
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-When you create a Serverless Function or a Serverlesss API, SAM will create additional AWS resources to wire everything up.
+When you create a Serverless Function or a Serverless API, SAM will create additional AWS resources to wire everything up.
 For example, when you create a ``AWS::Serverless::Function``, SAM will create a Lambda Function resource
 along with an IAM Role resource to give appropriate permissions for your function. This document describes all 
 such generated resources, how they are named, and how to refer to them in your SAM template.