Bump serde from 1.0.196 to 1.0.197 (#20)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.196 to 1.0.197.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.196...v1.0.197)

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

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

plprql-tests/Cargo.toml

@@ -17,7 +17,7 @@ pg_test = []
 
 [dependencies]
 pgrx = "=0.11.3"
-serde = { version = "1.0.196", features = ["derive"] }
+serde = { version = "1.0.197", features = ["derive"] }
 serde_json = "1.0.113"
 
 [dev-dependencies]