Bump third_party/pybind11/repo from `8de7772` to `8b03ffa` (#28202)

Bumps [third_party/pybind11/repo](https://github.com/pybind/pybind11) from `8de7772` to `8b03ffa`.
- [Release notes](https://github.com/pybind/pybind11/releases)
- [Commits](https://github.com/pybind/pybind11/compare/8de7772cc72daca8e947b79b83fea46214931604...8b03ffa7c06cd9c8a38297b1c8923695d1ff1b07)

---
updated-dependencies:
- dependency-name: third_party/pybind11/repo
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/third_party/pybind11/repo b/third_party/pybind11/repo
index 8de7772..8b03ffa 160000
--- a/third_party/pybind11/repo
+++ b/third_party/pybind11/repo
@@ -1 +1 @@
-Subproject commit 8de7772cc72daca8e947b79b83fea46214931604
+Subproject commit 8b03ffa7c06cd9c8a38297b1c8923695d1ff1b07