Bump boringssl from 02bc094 to 78b48c1

Bumps [boringssl](https://github.com/google/boringssl) from `02bc094` to `78b48c1`.
- [Release notes](https://github.com/google/boringssl/releases)
- [Commits](google/boringssl@02bc094...78b48c1)

---
updated-dependencies:
- dependency-name: boringssl
  dependency-version: 78b48c1f2a973ff0a4ed18b9618d533101bd4144
  dependency-type: direct:production
...

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Author: dependabot[bot]