Update numpy requirement from ~=2.0.1 to ~=2.1.2 in /fdml-gui (#43)

Updates the requirements on [numpy](https://github.com/numpy/numpy) to permit the latest version.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/RELEASE_WALKTHROUGH.rst)
- [Commits](numpy/numpy@v2.0.1...v2.1.2)

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

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

fdml-gui/requirements.txt

@@ -1,2 +1,2 @@
-numpy~=2.0.1
+numpy~=2.1.2
 pyqt5~=5.15.11