build(deps): bump third_party/googletest from `76bb2af` to `b3a9ba2` (#2281)

Bumps [third_party/googletest](https://github.com/google/googletest) from `76bb2af` to `b3a9ba2`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](https://github.com/google/googletest/compare/76bb2afb8b522d24496ad1c757a49784fbfa2e42...b3a9ba2b8e975550799838332803d468797ae2e1)

---
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 76bb2af..b3a9ba2 160000
--- a/third_party/googletest
+++ b/third_party/googletest
@@ -1 +1 @@
-Subproject commit 76bb2afb8b522d24496ad1c757a49784fbfa2e42
+Subproject commit b3a9ba2b8e975550799838332803d468797ae2e1