doc: add authors to cabal file

Author: wenkokke

lsm-tree.cabal

@@ -5,7 +5,9 @@ synopsis:           Log-structured merge-tree
 description:        Log-structured merge-tree.
 license:            Apache-2.0
 license-file:       LICENSE
-author:             Duncan Coutts, Joris Dral, Matthias Heinzel
+author:
+  Duncan Coutts, Joris Dral, Matthias Heinzel, Wolfgang Jeltsch, Wen Kokke, and Alex Washburn
+
 maintainer:         Duncan Coutts, Joris Dral, Matthias Heinzel
 copyright:          2023 Input Output Global Inc (IOG), INTERSECT 2023-2024
 category:           Database