[Translation] Fix example of using ICU message directly in code

[HypeMC]

Fixes #15402 & symfony/symfony#46723

[alexislefebvre]

Suggested change

	// Don't forget to suffix the domain with +intl-icu
	// Appending MessageCatalogueInterface::INTL_DOMAIN_SUFFIX will add the required suffix “+intl-icu” to the domain

IMHO, “Don't forget” looks like I have something to do, but the suffix is already added on the line after, so we can just explain what it will do.

[HypeMC]

Works for me.

[javiereguiluz]

Thanks @HypeMC!

While merging I did a minor tweak because the constant name is so long that the code looked a bit ugly: 2db0c59

[HypeMC]

Thanks @HypeMC!

While merging I did a minor tweak because the constant name is so long that the code looked a bit ugly: 2db0c59

@javiereguiluz Thanks, I like the improvement, but I'd suggest removing the use Symfony\Component\Translation\MessageCatalogueInterface; part in that case as well, as it is no longer needed.

[javiereguiluz]

Good catch! Removed in the use import in c4ee64a