Fix feature naming to use correct 'AWS Lambda durable functions' format

- Update README.md regional availability note to be more concise
- Fix template.yaml description to use 'AWS Lambda durable functions'
- Fix lambda_function.py docstring to use 'Lambda durable functions'
- Ensure consistent lowercase 'durable functions' throughout

Author: agawanea

lambda-durable-human-approval-sam/README.md

@@ -2,7 +2,7 @@
 
 This pattern demonstrates a human-in-the-loop approval workflow using AWS Lambda durable functions. The workflow pauses execution for up to 24 hours while waiting for human approval via email, automatically handling timeouts and resuming when decisions are received.
 
-**Important:** Lambda durable functions have limited regional availability. Please check the [AWS documentation](https://docs.aws.amazon.com/lambda/latest/dg/durable-functions.html) for current regional support.
+**Important:** Please check the [AWS documentation](https://docs.aws.amazon.com/lambda/latest/dg/durable-functions.html) for regions currently supported by AWS Lambda durable functions.
 
 Learn more about this pattern at Serverless Land Patterns: https://serverlessland.com/patterns/lambda-durable-hitl-approval-sam
 

lambda-durable-human-approval-sam/src/lambda_function.py

@@ -12,7 +12,7 @@
 
 @durable_execution
 def lambda_handler(event, context: DurableContext):
-    """Human-in-the-Loop Approval Pattern using Durable Functions"""
+    """Human-in-the-Loop Approval Pattern using Lambda durable functions"""
 
     # Parse input
     body = event.get('body')

lambda-durable-human-approval-sam/template.yaml

@@ -1,6 +1,6 @@
 AWSTemplateFormatVersion: '2010-09-09'
 Transform: AWS::Serverless-2016-10-31
-Description: Human-in-the-Loop Approval Pattern using Lambda Durable Functions
+Description: Human-in-the-Loop Approval Pattern using AWS Lambda durable functions
 
 Parameters:
   ApproverEmail: