Update qiskit-aer requirement from ~=0.14.2 to ~=0.15.0 (#2484)

Updates the requirements on [qiskit-aer](https://github.com/Qiskit/qiskit-aer) to permit the latest version.
- [Release notes](https://github.com/Qiskit/qiskit-aer/releases)
- [Commits](Qiskit/qiskit-aer@0.14.2...0.15)

---
updated-dependencies:
- dependency-name: qiskit-aer
  dependency-type: direct:production
...

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

requirements/requirements-qiskit.txt

@@ -1,4 +1,4 @@
 qiskit~=1.2.0
-qiskit-aer~=0.14.2
+qiskit-aer~=0.15.0
 qiskit-ibm-runtime~=0.20.0
 ply==3.11