Fixing wrong caddy file path

Signed-off-by: Ondrej Kubik <ondrej.kubik@canonical.com>

snap-src/bin/caddy-control

@@ -4,7 +4,7 @@
 source $SNAP/bin/wekan-read-settings
 
 if [ "$CADDY_ENABLED" = "true" ]; then
-    env LC_ALL=C caddy -conf=$SNAP_DATA/Caddyfile -host=localhost:${CADDY_PORT}
+    env LC_ALL=C caddy -conf=$SNAP_COMMON/Caddyfile -host=localhost:${CADDY_PORT}
 else
     snapctl stop caddy-service 2>&1 || true
     # sleep here, in case snapctl fails to stop service so we do not restart too often