feat: add .internal as a CORS domain in moonraker.conf (#631)

This adds .internal as a CORS domain in moonraker.conf, which is reserved by ICANN as a domain name for private top-level domains (TLDs).

Co-authored-by: dw-0 <th33xitus@gmail.com>
Co-authored-by: dw-0 <domwil1091+github@gmail.com>

resources/moonraker.conf

@@ -16,6 +16,7 @@ trusted_clients:
 cors_domains:
     *.lan
     *.local
+    *.internal
     *://localhost
     *://localhost:*
     *://my.mainsail.xyz