fix(docs): correct internal link for Contributing section in README

[MayaSatishRao]

What type of PR is this? (Check all that apply)

• 🛠 Refactor
• ✨ Feature
• 🐛 Bug Fix
• ⚡ Optimization
• 📝 Documentation Update

Description

Summary
This PR fixes the broken "Contributing" link in the README’s Table of Contents.
The issue occurred because the emoji (⚒️) in the section heading introduced a hidden Unicode variation selector, causing GitHub to generate an encoded anchor (#%EF%B8%8F-contributing) that didn’t match the Markdown link.

Changes Made

• Updated the ## ⚒️ Contributing heading to include a stable custom ID ().
• Updated the Table of Contents link to use #contributing for consistent behavior across Markdown renderers.
• Verified that all ToC links now work correctly on GitHub.

Related Tickets & Documents

• Closes [📄 DOCS] Broken “Contributing” link in README Table of Contents #2739

How to reproduce the issue

• Open the main README.md file on GitHub.
• Click on the “Contributing” entry in the Table of Contents.
  Observe that the link fails to scroll to the corresponding section.

Backporting

This change should be backported to:

• 3.0
• 3.1
• 4.0
• [ x] develop

Checklist

We encourage keeping the code coverage percentage at 80% or above.

• ✅ This solution meets the acceptance criteria of the related issue.
• [ x] 📝 The related issue checklist is completed.
• 🧪 This PR includes unit tests for the developed code.
  If not, explain why: documentation pr, hence unit test not required
• 🔄 End-to-End tests have been added or updated.
  If not, explain why: documentation pr, hence E2E test not required
• 📚 The documentation has been updated, or a dedicated issue has been created.
  If not, explain why:
• 📌 The release notes have been updated.
  If not, explain why: documentation pr, hence update to release notes not required

[trgiangdo]

This doesn't fix the problem. The problem was with the unicode of the #

Does it work in your environment?

[MayaSatishRao]

@trgiangdo Yes, it’s working fine on my local setup, and I’ve also tested it on a few online Markdown editors. The issue seems to be with the emoji ⚒️ — its Unicode (U+2692 U+FE0F) consists of two parts, which is causing the anchor link problem. I’ve resolved this by adding an explicit anchor tag, which fixes the issue.

[trgiangdo]

I see. It does seem to work in Github markdown preview

@FabienLelaquais @jrobinAV Please let me know what you think

[FredLL-Avaiga]

for consistency sake, would it be better to make the id start with a dash "-" ?
@FabienLelaquais what do you think ?