fix(docs): fix url link and table formatting in the customization docs

[baluyotraf]

Description

The docs currently is missing a space, which makes the reference part of the table, and one of the url reference is broken.

Checklist

• Add test cases to all the changes you introduce
• Run poetry all locally to ensure this change passes linter check and test
• Test the changes on the local machine manually
• Update the documentation for the changes

Expected behavior

The table and the reference are separate and the urls link to the right pages.

Steps to Test This Pull Request

Additional context

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.55%. Comparing base (120d514) to head (5cc8c6a).
Report is 590 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1399      +/-   ##
==========================================
+ Coverage   97.33%   97.55%   +0.21%     
==========================================
  Files          42       57      +15     
  Lines        2104     2656     +552     
==========================================
+ Hits         2048     2591     +543     
- Misses         56       65       +9     

Flag	Coverage Δ
unittests	97.55% <ø> (+0.21%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.