chore(docs): update batch docs highlight & links (#2320)

Co-authored-by: Alexander Schueren <sha@amazon.com>

Author: dreamorosi

docs/snippets/batch/gettingStartedAsync.ts

@@ -423,12 +423,11 @@ For these scenarios, you can subclass `BatchProcessor` and quickly override `suc
 * **`successHandler()`** – Keeps track of successful batch records
 * **`failureHandler()`** – Keeps track of failed batch records
 
-???+ example
-	Let's suppose you'd like to add a metric named `BatchRecordFailures` for each batch record that failed processing
-    
-    ```typescript hl_lines="17 21 25 31 35" title="Extending failure handling mechanism in BatchProcessor"
-    --8<-- "docs/snippets/batch/extendingFailure.ts"
-    ```
+Let's suppose you'd like to add a metric named `BatchRecordFailures` for each batch record that failed processing
+
+```typescript hl_lines="3 20 24 31 37" title="Extending failure handling mechanism in BatchProcessor"
+--8<-- "docs/snippets/batch/extendingFailure.ts"
+```
 
 ### Create your own partial processor
 
@@ -463,7 +462,7 @@ classDiagram
 
 You can then use this class as a context manager, or pass it to `processPartialResponseSync` to process the records in your Lambda handler function.
 
-```typescript hl_lines="21 30 41 62 73 84" title="Creating a custom batch processor"
+```typescript hl_lines="21 35 56 61 73 86" title="Creating a custom batch processor"
 --8<-- "docs/snippets/batch/customPartialProcessor.ts"
 ```
 

docs/utilities/batch.md

@@ -177,7 +177,6 @@ import {
   EventType,
   processPartialResponse,
 } from '@aws-lambda-powertools/batch';
-import axios from 'axios'; // axios is an external dependency
 import type {
   SQSEvent,
   SQSRecord,
@@ -188,8 +187,8 @@ import type {
 const processor = new BatchProcessor(EventType.SQS);
 
 const recordHandler = async (record: SQSRecord): Promise<number> => {
-  const res = await axios.post('https://httpbin.org/anything', {
-    message: record.body,
+  const res = await fetch('https://httpbin.org/anything', {
+    body: JSON.stringify({ message: record.body }),
   });
 
   return res.status;
@@ -207,8 +206,6 @@ export const handler = async (
 
 Check the [docs](https://docs.powertools.aws.dev/lambda/typescript/latest/utilities/batch/) for more examples.
 
-
-
 ## Contribute
 
 If you are interested in contributing to this project, please refer to our [Contributing Guidelines](https://github.com/aws-powertools/powertools-lambda-typescript/blob/main/CONTRIBUTING.md).
@@ -249,7 +246,7 @@ Share what you did with Powertools for AWS Lambda (TypeScript) 💞💞. Blog po
 
 ### Using Lambda Layer
 
-This helps us understand who uses Powertools for AWS Lambda (TypeScript) in a non-intrusive way, and helps us gain future investments for other Powertools for AWS Lambda languages. When [using Layers](#lambda-layers), you can add Powertools as a dev dependency (or as part of your virtual env) to not impact the development process.
+This helps us understand who uses Powertools for AWS Lambda (TypeScript) in a non-intrusive way, and helps us gain future investments for other Powertools for AWS Lambda languages. When [using Layers](https://docs.powertools.aws.dev/lambda/typescript/latest/#lambda-layer), you can add Powertools as a dev dependency (or as part of your virtual env) to not impact the development process.
 
 ## Credits