app/matrix: upgrade element-web to v1.8.5

riot-web containers are no longer published.

We shall also readjust our internal naming for matrix web client from
riot to something more generic at some point.

Change-Id: Ice85af3ae29b587c13a3ba27d13c9bd655d7fcfd
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1145
Reviewed-by: informatic <informatic@hackerspace.pl>
diff --git a/app/matrix/lib/matrix-ng.libsonnet b/app/matrix/lib/matrix-ng.libsonnet
index 3455b11..5149539 100644
--- a/app/matrix/lib/matrix-ng.libsonnet
+++ b/app/matrix/lib/matrix-ng.libsonnet
@@ -109,7 +109,7 @@
 
         images: {
             synapse: "matrixdotorg/synapse:v1.37.1",
-            riot: "vectorim/riot-web:v1.7.29",
+            riot: "vectorim/element-web:v1.8.5",
             casProxy: "registry.k0.hswaw.net/q3k/oauth2-cas-proxy:0.1.4",
             appserviceIRC: "matrixdotorg/matrix-appservice-irc:release-v0.29.0",
             appserviceTelegram: "dock.mau.dev/tulir/mautrix-telegram@sha256:c6e25cb57e1b67027069e8dc2627338df35d156315c004a6f2b34b6aeaa79f77",