[FIX] updating gitbook urls

[GuillaumeFalourd]

- What I did

• Updated Gitbook urls

- How I did it

• Updating Gitbook urls

- How to verify it

• Clicking on Gitbook urls

- Description for the changelog

• Update Gitbook urls

[codecov-io]

Codecov Report

Merging #81 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #81   +/-   ##
=======================================
  Coverage   45.24%   45.24%           
=======================================
  Files          56       56           
  Lines        2071     2071           
=======================================
  Hits          937      937           
  Misses        979      979           
  Partials      155      155           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9a2c0e3...bbfb8c6. Read the comment docs.