Bug 1711539 - Update translation note for about:welcome image caption r=flod,fluent-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D115260

browser/locales/en-US/browser/newtab/onboarding.ftl

@@ -150,6 +150,8 @@ mr1-welcome-screen-hero-text =
 
 # Caption for background image in about:welcome. "Soraya Osorio" is the name
 # of the person and shouldn't be translated.
+# In case your language needs to adapt the nouns to a gender, Soraya is a female name (she/her).
+# You can see the picture in about:welcome in Nightly 90.
 mr1-onboarding-welcome-image-caption = Soraya Osorio — Furniture designer, Firefox fan
 
 # This button will open system settings to turn on prefers-reduced-motion