Move 'jsha' from members to alumni

It's been great working with y'all, but I haven't had the time to devote to this work lately, so I'd like to update the team membership to reflect that fact. I hope I get to do some more work along similar veins in the future, so consider this "ta ta for now."

Author: jsha

teams/rustdoc.toml

@@ -7,14 +7,14 @@ members = [
     "GuillaumeGomez",
     "Manishearth",
     "camelid",
-    "jsha",
     "notriddle",
     "aDotInTheVoid",
     "fmease",
     "lolbinarycat",
     "yotamofek",
 ]
 alumni = [
+    "jsha",
     "Nemo157",
     "jyn514",
     "kinnison",