Bump trimesh from 3.18.2 to 3.18.3 (pyvista#3940)

Bumps [trimesh](https://github.com/mikedh/trimesh) from 3.18.2 to 3.18.3.
- [Release notes](https://github.com/mikedh/trimesh/releases)
- [Commits](mikedh/trimesh@3.18.2...3.18.3)

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

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

requirements_docs.txt

@@ -35,5 +35,5 @@ trame==2.2.6
 trame-client==2.5.1
 trame-server==2.8.1
 trame-vtk==2.0.17
-trimesh==3.18.2
+trimesh==3.18.3
 typed-ast==1.5.4