Bump docs Turing compat to 0.40-0.44

Turing 0.40 pins DynamicPPL ~0.37, which is incompatible with the
Mooncake 0.5.25+ this PR requires. Allowing 0.41-0.44 lets the resolver
land on Turing 0.44.4 + DynamicPPL 0.41.6, which compose with the new
stack.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: timweiland

docs/Project.toml

@@ -29,4 +29,4 @@ Turing = "fce5fe82-541a-59a6-adf8-730c64b5f9a0"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [compat]
-Turing = "0.40"
+Turing = "0.40, 0.41, 0.42, 0.43, 0.44"