docs(readme): Emphasize that setup must be written to init.lua

README.md

@@ -83,7 +83,7 @@ desc = "Save last project and exit the process"
 
 ---
 
-Additionally there are configurations that can be done using the plugin's `setup` function in Yazi's `init.lua`, i.e. `~/.config/yazi/init.lua`.
+Don't forget to add the plugin's `setup` function in Yazi's `init.lua`, i.e. `~/.config/yazi/init.lua`.
 The following are the default configurations:
 
 ```lua
@@ -111,6 +111,9 @@ require("projects"):setup({
 })
 ```
 
+> [!NOTE]
+> Settings that are not set will use the default value.
+
 ### `save`
 
 > [!NOTE]