Charter: Add annual meetings to the coda of Council operations
    
    This commit documents the existence and occurrence of in-person meetings
    by the Fedora Council, typically held on an annual basis or shared with
    other major events like Flock or DevConf conferences. These meetings are
    not actually a secret, since we already plan and discuss the agenda for
    these meetings in open, public channels. However, our charter does not
    mention them, and it should!
    
    This pulls the same language used by @mattdm in a previous Pull Request.
    Since that PR has a merge conflict and this change is already approved,
    I am facilitating it in a new Pull Request.
    
    Additionally, this change continues the gradual migration of our entire
    charter to follow the same AsciiDoc conventions shared by other docs in
    the Fedora community, e.g. one sentence per line. Some semantic changes
    were also made for brevity.
    
    I am pushing this commit as conditionally approved along with other in-
    person discussion happening the week of 6 February 2023 in Frankfurt,
    Germany.
    
    ref: Fedora-Council/council-docs#170
    
    Signed-off-by: Justin W. Flory (he/him) <jwf@redhat.com>