mail/sympa: update 6.2.16 -> 6.2.22

Please note:

• Web's static dirs have moved to a single dedicated directory.
• Users should review webserver's /static configuration (examples in share/examples/sympa).

PR: 223793
Submitted by: geoffroy desvernay <dgeo@centrale-marseille.fr> (maintainer)
Relnotes: https://github.com/sympa-community/sympa/blob/6.2.22/NEWS.md