Bump scipy from 1.11.3 to 1.11.4 in /requirements (AtsushiSakai#938)

Bumps [scipy](https://github.com/scipy/scipy) from 1.11.3 to 1.11.4.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](scipy/scipy@v1.11.3...v1.11.4)

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

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

Author: dependabot[bot]

requirements/requirements.txt

@@ -1,5 +1,5 @@
 numpy == 1.26.2
-scipy == 1.11.3
+scipy == 1.11.4
 matplotlib == 3.8.1
 cvxpy == 1.4.1
 pytest == 7.4.3 # For unit test