Update matplotlib requirement from ~=3.6.2 to ~=3.6.3

Updates the requirements on [matplotlib](https://github.com/matplotlib/matplotlib) to permit the latest version.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.6.2...v3.6.3)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 pip~=22.3
 voila~=0.3.6
-matplotlib~=3.6.2
+matplotlib~=3.6.3
 numpy~=1.24.1
 ipympl~=0.8.8
 scipy~=1.10.0