[ELI5] Tweak wording on the signup screen (#7136)

* Tweak signup wordings

* Update translations

src/locale/locales/zh-HK/messages.po

@@ -3314,7 +3314,7 @@ msgid "Input your password"
 msgstr "輸入你嘅密碼"
 
 #: src/screens/Signup/StepHandle.tsx:114
-msgid "Input your user handle"
+msgid "Type your desired username"
 msgstr "輸入你嘅帳號頭銜"
 
 #: src/view/com/composer/threadgate/ThreadgateBtn.tsx:49
@@ -8004,7 +8004,7 @@ msgid "Your following feed is empty! Follow more users to see what's happening."
 msgstr "你嘅「Following」動態源得個吉！跟多啲用戶睇吓發生緊啲咩事。"
 
 #: src/screens/Signup/StepHandle.tsx:125
-msgid "Your full handle will be"
+msgid "Your full username will be"
 msgstr "你嘅完整帳號頭銜會係"
 
 #: src/screens/Settings/components/ChangeHandleDialog.tsx:219
@@ -8044,5 +8044,5 @@ msgid "Your report will be sent to the Bluesky Moderation Service"
 msgstr "你嘅上報會傳送去 Bluesky 審核服務"
 
 #: src/screens/Signup/index.tsx:142
-msgid "Your user handle"
+msgid "Choose your username"
 msgstr "你嘅帳號頭銜"