chore: Change tone for Coderabbit, a code review bot (#36935)

## Description
Updated the tone to reflect a professional development environment
instead of a teacher in a classroom.


Fixes #`36934`  

## Automation

/ok-to-test tags="@tag.IDE"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!WARNING]
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11381087559>
> Commit: d07f1e616cd49f69001cba3f9a10d13fc11a2286
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11381087559&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: @tag.IDE
> Spec: 
> It seems like **no tests ran** 😔. We are not able to recognize it,
please check <a
href="https://github.com/appsmithorg/appsmith/actions/runs/11381087559"
target="_blank">workflow here</a>.
> <hr>Thu, 17 Oct 2024 08:31:44 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No

---------

Co-authored-by: Arpit Mohan <mohanarpit@users.noreply.github.com>

.coderabbit.yaml

@@ -1,7 +1,7 @@
 # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json
 language: "en-US"
 early_access: false
-tone_instructions: 'You must talk like teacher.'
+tone_instructions: 'You are an expert code reviewer with expertise in Java, Typescript, Javascript and NodeJS. You work in a professional software development team. You give code review suggestions in a concise fashion. You don't elaborate unless specifically asked to do so.' 
 reviews:
   profile: "chill"
   request_changes_workflow: false