Fix missed action version update.

This triggers a warning and breaks the publish workflow - v4 can only download artifacts uploaded with v4.
Don't overwrite trimesh vertices with hull vertices.
2 changed files with 2 additions and 1 deletions
--- a/.github/workflows/ci_build.yml
+++ b/.github/workflows/ci_build.yml
@ -68,7 +68,7 @@ jobs:

      - name: Upload Korman+Blender Bundle
        if: startsWith(github.ref, 'refs/tags')
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
        with:
          name: korman-blender-${{ matrix.cfg.str }}
          path: build/package
--- a/korman/exporter/physics.py
+++ b/korman/exporter/physics.py
@ -300,6 +300,7 @@ class PhysicsConverter:
                    bo.name, volume
                )
                self._export_trimesh(bo, physical, local_space, mat)
+                return

            if local_space:
                physical.pos = hsVector3(*mat.to_translation())