Bump third_party/mbedtls/repo from `1857335` to `83faeca` (#25943)

Bumps [third_party/mbedtls/repo](https://github.com/ARMmbed/mbedtls) from `1857335` to `83faeca`.
- [Release notes](https://github.com/ARMmbed/mbedtls/releases)
- [Commits](https://github.com/ARMmbed/mbedtls/compare/18573354f7dd224ba588c0151b4eede41f6e975d...83faeca59789874cfab70759a1a1fba8469339e3)

---
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 1857335..83faeca 160000
--- a/third_party/mbedtls/repo
+++ b/third_party/mbedtls/repo
@@ -1 +1 @@
-Subproject commit 18573354f7dd224ba588c0151b4eede41f6e975d
+Subproject commit 83faeca59789874cfab70759a1a1fba8469339e3