Fix X-Proxy-Secret header passthrough (#11984)

docker/main/rootfs/usr/local/nginx/conf/proxy_trusted_headers.conf

@@ -1,3 +1,6 @@
+# Header used to validate reverse proxy trust
+proxy_set_header X-Proxy-Secret $http_x_proxy_secret;
+
 # these headers will be copied to the /auth request and are available
 # to be mapped in the config to Frigate's remote-user header
 
@@ -19,4 +22,4 @@ proxy_set_header X-authentik-username $http_x_authentik_username;
 proxy_set_header X-authentik-groups $http_x_authentik_groups;
 proxy_set_header X-authentik-email $http_x_authentik_email;
 proxy_set_header X-authentik-name $http_x_authentik_name;
-proxy_set_header X-authentik-uid $http_x_authentik_uid;
+proxy_set_header X-authentik-uid $http_x_authentik_uid;