Fix flat config instructions

[mantoni]

The config instructions for ESLint flat configuration didn't work for me. I received this error message:

Oops! Something went wrong! :(                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                    
ESLint: 9.12.0                                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                    
A config object has a "plugins" key defined as an array of strings.                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                                    
Flat config requires "plugins" to be an object in this form:                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                    
    {                                                                                                                                                                                                                                                                               
        plugins: {                                                                                                                                                                                                                                                                  
            wc: pluginObject                                                                                                                                                                                                                                                        
        }                                                                                                                                                                                                                                                                           
    }                                                                                                                                                                                                                                                                               

With this change everything works fine.

[43081j]

Good catch. It is a typo, my mistake!