Unpin pre-release version of cirq

Symmer is pinned to a prerelease version of cirq, which requires downstream packages allow pre-release packages. This could result in unexpected beaviour including bugs and security vulnerabilities.

Has the functionality needed by circ been included in a main release by now?

https://github.com/qmatter-labs/symmer/blob/cf2e0710cd4b183a01f7ebdb1522584d9e68b964/pyproject.toml#L14C1-L14C38