Bump insta from 1.29.0 to 1.30.0 in /src/agent (#3221)

Bumps [insta](https://github.com/mitsuhiko/insta) from 1.29.0 to 1.30.0.
- [Changelog](https://github.com/mitsuhiko/insta/blob/master/CHANGELOG.md)
- [Commits](mitsuhiko/insta@1.29.0...1.30.0)

---
updated-dependencies:
- dependency-name: insta
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/agent/Cargo.lock

@@ -16,5 +16,5 @@ serde_json = "1.0"
 libclusterfuzz = { path = "../libclusterfuzz" }
 
 [dev-dependencies]
-insta = { version = "1.29.0", features = ["glob", "json"] }
+insta = { version = "1.30.0", features = ["glob", "json"] }
 pretty_assertions = "1.3"