Bump maggma from 0.68.6 to 0.69.0

Bumps [maggma](https://github.com/materialsproject/maggma) from 0.68.6 to 0.69.0.
- [Release notes](https://github.com/materialsproject/maggma/releases)
- [Changelog](https://github.com/materialsproject/maggma/blob/main/docs/CHANGELOG.md)
- [Commits](materialsproject/maggma@v0.68.6...v0.69.0)

---
updated-dependencies:
- dependency-name: maggma
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements-ci.txt

@@ -1,5 +1,5 @@
 coveralls
-maggma==0.68.6
+maggma==0.69.0
 mypy
 pytest
 pytest-cov