build(deps): bump cvxpy from 1.7.2 to 1.7.3 in /requirements

Bumps [cvxpy](https://github.com/cvxpy/cvxpy) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/cvxpy/cvxpy/releases)
- [Commits](cvxpy/cvxpy@v1.7.2...v1.7.3)

---
updated-dependencies:
- dependency-name: cvxpy
  dependency-version: 1.7.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements/requirements.txt

@@ -1,7 +1,7 @@
 numpy == 2.2.4
 scipy == 1.15.2
 matplotlib == 3.10.1
-cvxpy == 1.7.2
+cvxpy == 1.7.3
 ecos == 2.0.14
 pytest == 8.4.2 # For unit test
 pytest-xdist == 3.8.0 # For unit test