fix(caddy): drop h2c transport on jellyfin vhost

Jellyfin's Kestrel backend rejects the h2c upgrade preface, so Caddy turned
every request into a 502 while the same port answers 200 over plain HTTP/1.1
from Caddy's network. Default transport (HTTP/1.1) restores the vhost.

dankclaw/Caddyfile

@@ -198,11 +198,7 @@ files.franksdank.cloud {
 
 # --- Jellyfin ---
 jellyfin.franksdank.cloud {
-	reverse_proxy 192.168.0.235:8096 {
-		transport http {
-			versions h2c 1.1
-		}
-	}
+	reverse_proxy 192.168.0.235:8096
 }
 
 # --- *arr Stack ---