build(deps): bump third_party/googletest from `1d17ea1` to `4b21f1a` (#2391)

Bumps [third_party/googletest](https://github.com/google/googletest) from `1d17ea1` to `4b21f1a`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](https://github.com/google/googletest/compare/1d17ea141d2c11b8917d2c7d029f1c4e2b9769b2...4b21f1abddaf7d28388d7430bab69a81eccb1909)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/third_party/googletest b/third_party/googletest
index 1d17ea1..4b21f1a 160000
--- a/third_party/googletest
+++ b/third_party/googletest
@@ -1 +1 @@
-Subproject commit 1d17ea141d2c11b8917d2c7d029f1c4e2b9769b2
+Subproject commit 4b21f1abddaf7d28388d7430bab69a81eccb1909