Bump third_party/JoltPhysics from c1bdc5a to 4f9a86b (#5953)

Bumps [third_party/JoltPhysics](https://github.com/jrouwe/JoltPhysics) from `c1bdc5a` to `4f9a86b`.
- [Release notes](https://github.com/jrouwe/JoltPhysics/releases)
- [Commits](jrouwe/JoltPhysics@c1bdc5a...4f9a86b)

---
updated-dependencies:
- dependency-name: third_party/JoltPhysics
  dependency-type: direct:production
...

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