Update humanoid-character-profile.ftl (TheDenSS14#123)

Fixes the pronouns in the character preview to not show they/them
pronouns for characters that use it/its

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# Description

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This just adds another condition in the fluent file that controls the
character preview text.

Essentially, characters that use it/its pronouns will go from:

"This is [character]. They are X years old."

to

"This is [character]. It is X years old."

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# TODO

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- [x] Probably test it, maybe.

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# Changelog

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:cl: Azzy
- fix: Fixed they/them pronouns being displayed for it/its characters in
the character preview.

Resources/Locale/en-US/preferences/humanoid-character-profile.ftl

@@ -5,5 +5,6 @@ humanoid-character-profile-summary =
     This is {$name}. {$gender ->
     [male] He is
     [female] She is
+    [neuter] It is
     *[other] They are
-} {$age} years old.
+} {$age} years old.