raise default systemd unit start/stop timeout

default of 90 seconds can be too low if hardware is not very fast
and rocksdb compaction or shutdown takes too long

Signed-off-by: strawberry <strawberry@puppygock.gay>

debian/matrix-conduit.service

 [Unit]
-Description=Conduit Matrix homeserver
+Description=conduwuit Matrix homeserver
 After=network-online.target
 
 [Service]
@@ -50,6 +50,9 @@ ExecStart=/usr/sbin/matrix-conduit
 Restart=on-failure
 RestartSec=5
 
+TimeoutStopSec=4m
+TimeoutStartSec=4m
+
 StartLimitInterval=1m
 StartLimitBurst=5