docs(council): Replace "Council" with `{team_name}`
    
    This commit changes almost every occurrence of "Council" and "Fedora
    Council" with `{team_name}`, an Antora macro that resolves to "Fedora
    Council". This continues the integration work with the team profile
    introduced in previous commits. It ensures consistent use of the Fedora
    Council name in our documents and may also contribute to a slight boost
    in search engine optimization.
    
    Signed-off-by: Justin W. Flory (he/him) <jwf@redhat.com>