Bump qiskit-aer-gpu from 0.11.2 to 0.12.2 (#176)

Bumps [qiskit-aer-gpu](https://github.com/Qiskit/qiskit-aer) from 0.11.2 to 0.12.2.
- [Release notes](https://github.com/Qiskit/qiskit-aer/releases)
- [Commits](Qiskit/qiskit-aer@0.11.2...0.12.2)

---
updated-dependencies:
- dependency-name: qiskit-aer-gpu
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -51,6 +51,6 @@
                       'tests': ['pytest', 'seaborn', 'flake8', 'mne', 'pooch'],
                       # GPU optimization not available on all platform.
                       # See https://github.com/Qiskit/qiskit-aer/issues/929#issuecomment-691716936
-                      'optim': ['qiskit-aer-gpu==0.11.2']},
+                      'optim': ['qiskit-aer-gpu==0.12.2']},
       zip_safe=False,
 )