Update simpleitk requirement from <2.4.0,>=2.1.0 to >=2.1.0,<2.5.0

Updates the requirements on [simpleitk](https://github.com/SimpleITK/SimpleITK) to permit the latest version.
- [Release notes](https://github.com/SimpleITK/SimpleITK/releases)
- [Commits](SimpleITK/SimpleITK@v2.1.0...v2.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,4 +1,4 @@
-SimpleITK >=2.1.0, <2.4.0
+SimpleITK >=2.1.0, <2.5.0
 
 numpy
 pydicom