add Sara as mentor (and author)

Author: TimidRobot

content/blog/authors/sara/contents.lr

@@ -0,0 +1,12 @@
+username: sara
+---
+name: Sara Lovell
+---
+md5_hashed_email:
+---
+about:
+Sara is the Full-Stack Engineer at [Creative Commons][creativecommons]. She is
+`@sara` on [CC Slack](/community/) and [possumbilities][github] on GitHub.
+
+[creativecommons]: https://creativecommons.org/author/saracreativecommons-org/
+[github]: https://github.com/possumbilities

content/programs/contents.lr

@@ -63,6 +63,8 @@ We will apply for the December 2022 interships.
 
 | Name | Pronouns | Slack Username |
 | ---- | -------- | -------------- |
+| [Sara][authorsara] | she/her | `@sara` |
 | [Timid Robot][authortimidrobot] | they/them | `@Timid Robot` |
 
+[authorsara]: /blog/authors/TimidRobot/
 [authortimidrobot]: /blog/authors/TimidRobot/