docs/release-calendar: update and extend

v2: Correct 17.1.10 version, adjust some names.
v3: Add missing <tr> (Andres)

Cc: Juan A. Suárez <jasuarez@igalia.com>
Cc: Andres Gomez <agomez@igalia.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> (v1)
1 file changed