Bump serde from 1.0.193 to 1.0.194

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.193 to 1.0.194.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.193...v1.0.194)

---
updated-dependencies:
- dependency-name: serde
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -17,7 +17,7 @@ lazy_static = "1.4.0"
 log = "0.4.20"
 openssl = { version = "0.10", features = ["vendored"] }
 prometheus = { version = "0.13.3", features = ["process"] }
-serde = "1.0.193"
+serde = "1.0.194"
 serde_json = "1.0.109"
 serde_yaml = "0.9.29"
 simple_logger = "4.3.3"