Actually bump version to 4.0.4-rc :o)

version.py

@@ -2,8 +2,8 @@ short_name = "godot"
 name = "Godot Engine"
 major = 4
 minor = 0
-patch = 3
-status = "stable"
+patch = 4
+status = "rc"
 module_config = ""
 year = 2023
 website = "https://godotengine.org"