Mercado Libre as known instance of the Trusted Committer pattern (#505)

* Add Mercado Libre as known instance of the Trusted Committer pattern
* Add Mercado Libre trusted committer image
* Add slack inviter to ignore list, to fix link check

Co-authored-by: Sebastian Spier <github@spier.hu>

Author: privero-meli

.lycheeignore

@@ -8,3 +8,4 @@ fearlesschangepatterns.com
 https://ulir.ul.ie/bitstream/handle/10344/4443/Stol_2014_inner.pdf
 .*@andrew.clegg.*
 https://m.dotdev.co/how-to-write-a-readme-that-rocks-bc29f279611a
+https://innersourcecommons-inviter.herokuapp.com

assets/img/mercadolibre-trusted-committers.png

@@ -127,6 +127,9 @@ This has been tried and proven successful at:
 
 - Nike
 - PayPal
+- Mercado Libre - adds a section in the `CONTRIBUTING.md` file to inform who the Trusted Committers are.
+
+![Trusted Committer section in CONTRIBUTING.md of Mercado Libre](../../assets/img/mercadolibre-trusted-committers.png "Trusted Committer section in CONTRIBUTING.md of Mercado Libre")
 
 ## Status