Update username/github link of Gankra (#443)

* Update username/github link of Gankra

Username previously listed for Gankra linked to a redirect github page.
This was noticed by @Moongoodgirl who mentioned it on Freenode/##rust.
I have also replaced the pronouns on the page with gender neutral
'they'. However, the ideal solution would be to get in touch with Alexis
and ask them what pronouns they would like on the page.

Reported-by: @Moongoodgirl
Signed-off-by: @aoeixsz4
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#	modified:   fott.md
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* Update fott.md

Alexis informed us that she goes by she/her.
Update pronouns to match.

Author: aoeixsz4

src/archive/fott.md

@@ -105,7 +105,7 @@ TWiR running, Vikrant, you friend of the tree.
 
 ## 2015-07-24 Tshepang Lekhonkhobe
 
-[@Gankro](http://github.com/Gankro) has nominated
+[@Gankra](http://github.com/Gankra) has nominated
 [@tshepang](http://github.com/tshepang) for Friend of the Tree this week:
 
 Over the last year Tshepang has landed over 100 improvements to our
@@ -255,16 +255,16 @@ checker. He has also completely rewritten how unboxed closures interact with
 monomorphization and had a huge impact on making them usable. Brian Koropoff is
 truly a Friend of the Tree.
 
-## 2014-10-07 Alexis Beingessner (Gankro)
+## 2014-10-07 Alexis Beingessner (Gankra)
 
-Alexis Beingessner (aka @Gankro) began contributing to Rust in July, and has
-already had a major impact on several library-related areas. His main focus has
-been collections. He completely rewrote BTree, providing a vastly more complete
-and efficient implementation. He proposed and implemented the new Entry API.
-He's written extensive new documentation for the collections crate. He pitched
+Alexis Beingessner (aka @Gankra) began contributing to Rust in July, and has
+already had a major impact on several library-related areas. Her main focus has
+been collections. She completely rewrote BTree, providing a vastly more complete
+and efficient implementation. She proposed and implemented the new Entry API.
+She's written extensive new documentation for the collections crate. She pitched
 in on collections reform.
 
-And he added collapse-all to rustdoc!
+And she added collapse-all to rustdoc!
 
 Alexis is, without a doubt, a FOTT.