_staffers: Add example usage for meta

Author: kevinlin1

_staffers/kevin.md

@@ -4,6 +4,8 @@ role: Instructor
 email: [email protected]
 website: https://kevinl.info
 photo: kevin.jpg
+meta:
+  Office Hours: Somewhere on the internet
 ---
 
 [Schedule an appointment](#){: .btn .btn-outline }