Update setuptools requirement from ~=68.2.2 to ~=69.0.3

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v68.2.2...v69.0.3)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 music21~=9.1.0
 pyside6~=6.6.0
-setuptools~=68.2.2
+setuptools~=69.0.3
 sympy~=1.12
 pygame~=2.5.2
 numpy~=1.26.1