build(deps): bump webxr from `7763f48` to `cc6af6d`
build(deps): bump webxr from `7763f48` to `cc6af6d`

Bumps [webxr](https://github.com/servo/webxr) from `7763f48` to `cc6af6d`.
- [Release notes](https://github.com/servo/webxr/releases)
- [Commits](https://github.com/servo/webxr/compare/7763f4826fb04a1b48dbf502e48ca9d6ff3b6378...cc6af6d8f4244dd5523a2dbc1f49d5f60b054f57)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo,KiChjang/servo