Bug 28442: Add 21.11 release team to teams.yaml

Bug 28442: Add 21.11 release team to teams.yaml

Add the 21.11 release team.

Test plan
1/ Check against https://wiki.koha-community.org/wiki/Release_Teams

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 467e7e4788ae771c26004a6b5e2951ddf19ed82d)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 4f603468d102fbe4f0e63561f18e3f242a6d3588)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
(cherry picked from commit 7b00f4fcf34566dbb82f6f31ef1fd053b92e60b4)
Signed-off-by: Wainui Witika-Park <wainuiwitikapark@catalyst.net.nz>
(cherry picked from commit 7b00f4fcf34566dbb82f6f31ef1fd053b92e60b4)