Bumps [deps/rapidjson](https://github.com/Tencent/rapidjson) from `fcb23c2` to `781a4e6`.
- [Release notes](https://github.com/Tencent/rapidjson/releases)
- [Commits](fcb23c2dbf...781a4e667d
)
---
updated-dependencies:
- dependency-name: deps/rapidjson
dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>