Bump third-party/fast_double_parser from cee3272 to 38c6d6d

Bumps [third-party/fast_double_parser](https://github.com/lemire/fast_double_parser) from `cee3272` to `38c6d6d`.
- [Release notes](https://github.com/lemire/fast_double_parser/releases)
- [Commits](lemire/fast_double_parser@cee3272...38c6d6d)

---
updated-dependencies:
- dependency-name: third-party/fast_double_parser
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>