feat(ccn): ajout d'un synonyme pour la CC 1486

[maxgfr]

refer to https://github.com/SocialGouv/code-du-travail-numerique/issues/5213

[github-actions[bot]]

:tada: This PR is included in version 2.577.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• v2.577.0
• GitHub release

Your semantic-release bot :package::rocket: