Bump the python-dependencies group with 2 updates (#172)

Updates the requirements on [pre-commit](https://github.com/pre-commit/pre-commit) and [optimade[server]](https://github.com/Materials-Consortia/optimade-python-tools) to permit the latest version.

Updates `pre-commit` to 4.0.1
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/main/CHANGELOG.md)
- [Commits](pre-commit/pre-commit@v3.8.0...v4.0.1)

Updates `optimade[server]` from 1.1.3 to 1.1.5
- [Release notes](https://github.com/Materials-Consortia/optimade-python-tools/releases)
- [Changelog](https://github.com/Materials-Consortia/optimade-python-tools/blob/v1.1.5/CHANGELOG.md)
- [Commits](Materials-Consortia/optimade-python-tools@v1.1.3...v1.1.5)

---
updated-dependencies:
- dependency-name: pre-commit
  dependency-type: direct:production
  dependency-group: python-dependencies
- dependency-name: optimade[server]
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-dependencies
...

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

make_ghpages/requirements.txt

@@ -1,2 +1,2 @@
 jinja2==3.1.4
-optimade[server]==1.1.3
+optimade[server]==1.1.5

requirements.txt

@@ -1 +1 @@
-pre-commit~=3.8
+pre-commit~=4.0