Use debug logging in CI to debug uv lock deadlock (#1137)

We often see `uv` hanging at this line
https://github.com/astral-sh/uv/blob/d178e453684437889a30b3ffd17e56d695fba60d/crates/uv-fs/src/lib.rs#L677-L680
. By enabling debug output, we can hopefully see where the lock was
acquired before.

See #1090

Author: phil-opp

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ on:
   workflow_dispatch:
 
 env:
-  RUST_LOG: INFO
+  RUST_LOG: DEBUG
 
 jobs:
   test: