Used version pinning instead of release pinning to avoid unexpected upgrades for
users running FreedomBox stable.
Explanation for backports:
This fixes incompatibility issues with newly created rooms on Matrix Synapse
versions 0.99.5 and above. Users on stable using 0.99.2 might not be able to
join those rooms, especially direct chats.
Fixes#1600
Signed-off-by: Joseph Nuthalapati <njoseph@riseup.net>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
9b46d1a661