fix: wrong taxonomy label case in product attributes

[creative-andrew]

What does this implement/fix? Explain your changes.

Product attribute taxonomy labels are returned with all words in uppercase.
There is no need to call ucwords as the label is correctly saved on the database taxonomy object.

/var/www/html $ wp taxonomy get pa_schirmgroesse
Field         | Value                                                                                                                                                   
name          | pa_schirmgroesse                                                                                                                                        
label         | Produkt Schirmgröße in cm                                                                                                                              

Data returned by wp-graphql-woocommerce

with the fix applied:

Where has this been tested?

• **WooGraphQL Version: 0.19.0
• **WPGraphQL Version: 1.25.0
• **WordPress Version: 6.5.3
• **WooCommerce Version: 8.8.3