Bump deps/mbedtls from d0c7b79 to 2427d15 (#54)

Bumps [deps/mbedtls](https://github.com/ARMmbed/mbedtls) from `d0c7b79` to `2427d15`.
- [Release notes](https://github.com/ARMmbed/mbedtls/releases)
- [Commits](Mbed-TLS/mbedtls@d0c7b79...2427d15)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>