Update optimade[server] requirement from ~=0.24.1 to ~=0.25.3

Updates the requirements on [optimade[server]](https://github.com/Materials-Consortia/optimade-python-tools) to permit the latest version.
- [Release notes](https://github.com/Materials-Consortia/optimade-python-tools/releases)
- [Changelog](https://github.com/Materials-Consortia/optimade-python-tools/blob/master/CHANGELOG.md)
- [Commits](Materials-Consortia/optimade-python-tools@v0.24.1...v0.25.3)

---
updated-dependencies:
- dependency-name: optimade[server]
  dependency-type: direct:production
...

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

requirements.txt

@@ -1,4 +1,4 @@
-optimade[server]~=0.24.1
+optimade[server]~=0.25.3
 aiida-core~=2.4.0
 pymatgen>=2019.7.2,!=2019.9.7,<2023.6.24