Bump addons/vuforia-spatial-core-addon in the submodules group

Bumps the submodules group with 1 update: [addons/vuforia-spatial-core-addon](https://github.com/ptcrealitylab/vuforia-spatial-core-addon).


Updates `addons/vuforia-spatial-core-addon` from `44087f1` to `783f8de`
- [Release notes](https://github.com/ptcrealitylab/vuforia-spatial-core-addon/releases)
- [Commits](ptcrealitylab/vuforia-spatial-core-addon@44087f1...783f8de)

---
updated-dependencies:
- dependency-name: addons/vuforia-spatial-core-addon
  dependency-type: direct:production
  dependency-group: submodules
...

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