feat: new logo by Ja Young Lee (#120)

Updates the Mellea logo and adds Ja Young Lee as a contributor

Author: nrfulton

docs/mellea_draft_logo_300.png

@@ -13,7 +13,8 @@ authors = [
     { name = "Masataro Asai", email = "[email protected]" },
     { name = "Supriya Lall", email = "[email protected]" },
     { name = "Xiaojie Guo", email = "[email protected]" },
-    { name = "Jake LoRocco", email = "[email protected]" }
+    { name = "Jake LoRocco", email = "[email protected]" },
+    { name = "Ja Young Lee", email = "[email protected]" },
 ]
 description = "mellea is a library for writing generative programs"
 readme = "README.md"