Install async-timeout rather than pin aiohttp (#455)

In #454, I pinned `aiohttp`, but the failure was actually due to
`async-timeout` not being installed
(#453 (comment)).

This PR updates `pyproject.toml` in accordance with this root cause.

We can remove this line once a version of ray is released that fixes
ray-project/ray#41267.

pyproject.toml

@@ -92,7 +92,7 @@ docs = [
 notebook-dependencies = [
     "circuit-knitting-toolbox[cplex,pyscf]",
     "quantum-serverless>=0.0.7",
-    "aiohttp!=3.9.0",
+    "async-timeout",
     "matplotlib",
     "ipywidgets",
     "pylatexenc",