update ziglmdb and remove unneeded directory creation from flake

[chirp] / ext / ziglmdb

diff --git a/ext/ziglmdb b/ext/ziglmdb
index 88cb74a430fa9629c8127c3a866c40e79a8e4612..f585842e51d2e0ded5ee2e941e468657a1f93aff 160000 (submodule)
--- a/ext/ziglmdb
+++ b/ext/ziglmdb
@@ -1 +1 @@
-Subproject commit 88cb74a430fa9629c8127c3a866c40e79a8e4612
+Subproject commit f585842e51d2e0ded5ee2e941e468657a1f93aff