Update Article 22 - ending membership if subscription payments lapse

[Hibby]

Update Article 22, currently reading:

If the membership subscription payable by any member remains
outstanding more than 2 months after the date on which it fell due -
and providing he/she has been given at least one reminder (either in
writing or by e-mail) - the board may, by resolution to that effect,
expel him/her from membership.

To include a 12 month time limit for outstanding payment, and after 12 months they are considered Automatically dismembered.

If the membership subscription payable by any member remains
outstanding more than 2 months after the date on which it fell due -
and providing he/she has been given at least one reminder (either in
writing or by e-mail) - the board may, by resolution to that effect,
expel him/her from membership. If, 12 months after the date on which
an outstanding payment fell due it has not been paid, the member shall
be expelled from membership.

[AndyGaskell]

The work by @Nick0o in the PR 2023 AGM Proposal #6 covers this.

[AndyGaskell]

Passed at the AGM, see https://github.com/hackerdeen/meetings/blob/master/2023/2023-04-04_AGM_Minutes.md

PR merged.