Add forgotten contributor in CONTRIBUTORS.md

[micka-fdz]

Questions	Answers
Branch?	1.7.8.x
Description?	Add forgotten contributor in CONTRIBUTORS.md
Type?	improvement
Category?	PM
BC breaks?	no
Deprecations?	no
Fixed ticket?	-
How to test?	-
Possible impacts?	-

This change is 

[prestonBot]

Hi, thanks for this contribution!

I found some issues with the Pull Request description:

• The description shouldn't be empty.
• The type should be one of these: new feature, improvement, bug fix or refacto (Read explanation).
• The category should be one of these: BO, CO, FO, IN, LO, ME, PM, TE or WS (Read explanation)
• Your pull request does not seem to fix any issue, consider creating one (see note below) and linking it by writing Fixes #1234.

Would you mind having a look at it? This will help us understand how interesting your contribution is, thank you very much!

About linked issues

Please consider opening an issue before submitting a Pull Request:

• If it's a bug fix, it helps maintainers verify that the bug is effectively due to a defect in the code, and that it hasn't been fixed already.
• It can help trigger a discussion about the best implementation path before a single line of code is written.
• It may lead the Core Product team to mark that issue as a priority, further attracting the maintainers' attention.

(Note: this is an automated message, but answering it will reach a real human)

[prestonBot]

Contribution merged, congratulations!

Would you mind answering our quick 1-minute survey? We would love to hear about your experience so far, it will help us improve our process for the community involved, like you. ;-)

[matthieu-rolland]

thank you @micka-fdz !