chore(deps): bump thirdparty/eigen from b396a6f to 53b83cd

Bumps [thirdparty/eigen](https://gitlab.com/libeigen/eigen) from `b396a6f` to `53b83cd`.
- [Release notes](https://gitlab.com/libeigen/eigen/tags)
- [Commits](https://gitlab.com/libeigen/eigen/compare/b396a6fbb2e173f52edb3360485dedf3389ef830...53b83cddf96ea76c75c248e7677872961b64cc0d)

---
updated-dependencies:
- dependency-name: thirdparty/eigen
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>