chore(team): add Katherine to leadership

Author: Yuxiang-Huang

teams/leadership.toml

@@ -26,6 +26,7 @@ contributors = [
     "laasyaaki",     # Tech Co-Lead of CMU Eats
     "luke992",       # Tech Co-Lead of CMU Maps
     "ellylai",       # Tech Co-Lead of CMU Maps
+    "kath45823",     # Tech Lead of Corgi
     "cirex-web",     # Tech Lead of Flex
     "axgu",          # Tech Lead of Lost and Found
     "ap-1",          # Tech Lead of Terrier