Update README with new CLI flags:

Signed-off-by: Jacob Weinstock <jakobweinstock@gmail.com>

README.md

@@ -149,6 +149,9 @@ FLAGS
   -tink-server                        [http] IP:Port for the Tink server
   -tink-server-tls                    [http] use TLS for Tink server (default "false")
   -trusted-proxies                    [http] comma separated list of trusted proxies in CIDR notation
+  -iso-enabled                        [iso] enable serving Hook as an iso (default "false")
+  -iso-magic-string                   [iso] the string pattern to match for in the source iso, if not set the default from HookOS is used
+  -iso-url                            [iso] the url for source iso before binary patching
   -otel-endpoint                      [otel] OpenTelemetry collector endpoint
   -otel-insecure                      [otel] OpenTelemetry collector insecure (default "true")
   -syslog-addr                        [syslog] local IP to listen on for Syslog messages (default "172.17.0.3")