fix : readme

README.md

 # aidge_shared_files
-[[_TOC_]]
+[_TOC_]
 This repository holds files common to the repositories of the Aidge group.
 For more informations on how the ci works [head to the dedicated page in the wiki.](https://gitlab.eclipse.org/groups/eclipse/aidge/-/wikis/Understand-the-CI-CD-Pipelines)