Bump third_party/mbedtls/repo from `247e6f0` to `45350b6` (#26919)

Bumps [third_party/mbedtls/repo](https://github.com/ARMmbed/mbedtls) from `247e6f0` to `45350b6`.
- [Release notes](https://github.com/ARMmbed/mbedtls/releases)
- [Commits](https://github.com/ARMmbed/mbedtls/compare/247e6f088dbe19e5482e038009f45210586036c9...45350b66503b08cafc8aa4f42a2875aca0f0e062)

---
updated-dependencies:
- dependency-name: third_party/mbedtls/repo
  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/mbedtls/repo b/third_party/mbedtls/repo
index 247e6f0..45350b6 160000
--- a/third_party/mbedtls/repo
+++ b/third_party/mbedtls/repo
@@ -1 +1 @@
-Subproject commit 247e6f088dbe19e5482e038009f45210586036c9
+Subproject commit 45350b66503b08cafc8aa4f42a2875aca0f0e062