requirements: update scipy requirement

Updates the requirements on [scipy](https://github.com/scipy/scipy) to permit the latest version.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](scipy/scipy@v1.7.3...v1.15.0)

---
updated-dependencies:
- dependency-name: scipy
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -17,6 +17,6 @@ pillow<11.2.0
 pint<0.22.0
 protobuf<3.20.4
 rich>=10.1, <10.13
-scipy>=1.7.3, <1.15
+scipy>=1.7.3, <1.16
 toposort<1.11
 torch>=1.10.0, <2.6.0; (platform_machine == 'AMD64' or platform_machine == 'x86_64' or platform_machine == 'arm64' or platform_machine == 'aarch64') and platform_python_implementation == 'CPython' and implementation_name == 'cpython'