fix: contributing doc

CONTRIBUTING.md

@@ -6,15 +6,13 @@ This document describes the process and requirements for contributing to this UD
 
 ## Table of Contents
 
-- [Welcome to UDS Core](#welcome-to-uds-core)
-  - [Table of Contents](#table-of-contents)
-  - [Developer Experience](#developer-experience)
-  - [Definition of Done](#definition-of-done)
-  - [Getting Started](#getting-started)
-  - [Submitting a Pull Request](#submitting-a-pull-request)
-    - [Note for External Contributors](#note-for-external-contributors)
-    - [PR Requirements](#pr-requirements)
-  - [Contact](#contact)
+1. [Developer Experience](#developer-experience)
+2. [Definition of Done](#definition-of-done)
+3. [Getting Started](#getting-started)
+4. [Submitting a Pull Request](#submitting-a-pull-request)
+   - [Note for External Contributors](#note-for-external-contributors)
+5. [PR Requirements](#pr-requirements)
+6. [Contact](#contact)
 
 ## Developer Experience