:book: Add tokei badge (ast)

diff --git a/ast b/ast
index 793836da41b41f3a4ff1e968f6849275d0224ba9..d642b8acb16eb0acb1c3ac55ab6220f0e60640b2 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 793836da41b41f3a4ff1e968f6849275d0224ba9
+Subproject commit d642b8acb16eb0acb1c3ac55ab6220f0e60640b2