docs(contributing): clarify use of scopes in commit example

Update the example commits under the "Use Conventional Commits" section to demonstrate proper usage of scopes and how to indicate breaking changes with the `!` symbol. This improves clarity for contributors and aligns example with expected commit formatting.

Signed-off-by: dharapandya85 <[email protected]>

Author: dharapandya85

CONTRIBUTING.md

@@ -7,11 +7,10 @@ Thank you for your interest in contributing to `patch-hub`! This document outlin
 1. [Code of Conduct](#code-of-conduct)
 2. [Getting Started](#getting-started)
 3. [Development Workflow](#development-workflow)
-4. [Coding Style](#coding-style)
-5. [Commit Guidelines](#commit-guidelines)
-6. [Pull Request Guidelines](#pull-request-guidelines)
-7. [Issue Reporting](#issue-reporting)
-8. [Communication](#communication)
+4. [Commit Guidelines](#commit-guidelines)
+5. [Pull Request Guidelines](#pull-request-guidelines)
+6. [Issue Reporting](#issue-reporting)
+7. [License](#license)
 
 ## Code of Conduct