app/matrix: bump matrix-media-repo to v1.2.12

Change-Id: I4192c6a54537c10724c63c373083eca5bd0c298e
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1391
Reviewed-by: informatic <informatic@hackerspace.pl>
diff --git a/app/matrix/lib/matrix-ng.libsonnet b/app/matrix/lib/matrix-ng.libsonnet
index 5475901..1a95369 100644
--- a/app/matrix/lib/matrix-ng.libsonnet
+++ b/app/matrix/lib/matrix-ng.libsonnet
@@ -115,7 +115,7 @@
             appserviceIRC: "matrixdotorg/matrix-appservice-irc:release-0.35.0",
             appserviceTelegram: "dock.mau.dev/tulir/mautrix-telegram@sha256:c6e25cb57e1b67027069e8dc2627338df35d156315c004a6f2b34b6aeaa79f77",
             wellKnown: "registry.k0.hswaw.net/q3k/wellknown:1611960794-adbf560851a46ad0e58b42f0daad7ef19535687c",
-            mediaRepo: "turt2live/matrix-media-repo:v1.2.8",
+            mediaRepo: "turt2live/matrix-media-repo:v1.2.12",
             coturn: "coturn/coturn:4.5.2-r11-alpine",
         },