Bump mdanalysis from 2.7.0 to 2.9.0 (#1176)

Bumps [mdanalysis](https://github.com/mdanalysis/mdanalysis) from 2.7.0 to 2.9.0.
- [Release notes](https://github.com/mdanalysis/mdanalysis/releases)
- [Commits](MDAnalysis/mdanalysis@package-2.7.0...package-2.9.0)

---
updated-dependencies:
- dependency-name: mdanalysis
  dependency-version: 2.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -119,12 +119,12 @@ strict = [
     "typing-extensions==4.13.2",
 ]
 strict-openff = [
-    "mdanalysis==2.7.0",
+    "mdanalysis==2.9.0",
     "monty==2025.3.3",
     "openmm-mdanalysis-reporter==0.1.0",
     "openmm==8.1.1",
     "pymatgen==2024.11.13", # TODO: open ff is extremely sensitive to pymatgen version
-    "mdanalysis==2.7.0"
+    "mdanalysis==2.9.0"
 ]
 strict-forcefields = [
     "calorine==3.0",