add php 8.3

Signed-off-by: Zoey <zoey@z0ey.de>

rootfs/usr/local/nginx/conf/nginx.conf

@@ -81,6 +81,10 @@ http {
         server unix:/run/php82.sock;
     }
 
+    upstream php83 {
+        server unix:/run/php83.sock;
+    }
+
     # Fancy Index
     fancyindex on;
     fancyindex_localtime on;