Bump matgl from 1.2.5 to 1.2.6 (#1177)

Bumps [matgl](https://github.com/materialsvirtuallab/matgl) from 1.2.5 to 1.2.6.
- [Release notes](https://github.com/materialsvirtuallab/matgl/releases)
- [Changelog](https://github.com/materialsvirtuallab/matgl/blob/main/changes.md)
- [Commits](materialsvirtuallab/matgl@v1.2.5...v1.2.6)

---
updated-dependencies:
- dependency-name: matgl
  dependency-version: 1.2.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -130,7 +130,7 @@ strict-forcefields = [
     "calorine==3.0",
     "chgnet==0.3.8",
     "mace-torch==0.3.12",
-    "matgl==1.2.5",
+    "matgl==1.2.6",
     "quippy-ase==0.9.14; python_version < '3.12'",
     "sevenn==0.10.3",
     "torch==2.2.0",