Fix documented definition of ``UGate`` (#7198)
Fix documented definition of ``UGate`` (#7198)

* Update u.py

Fixes #7197

* Update u.py

Fixed a typo in the previous pull request.

* Update qiskit/circuit/library/standard_gates/u.py

Co-authored-by: Julien Gacon <2578673985e8ae3d22330d3daafe06433268eaa0@gmail.com>
Co-authored-by: mergify[bot] <b09a6ee808b67e98a221404e7aaa52e0398a4954@users.noreply.github.com>
QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py