Update Rust crate serde_json to 1.0.68

Author: renovate-bot

Cargo.toml

@@ -76,7 +76,7 @@ semver = { version = "1.0.3", features = ["serde"] }
 sentry = { version = "0.23.0", features = ["tracing"] }
 sentry-conduit = { version = "0.3.0", default-features = false }
 serde = { version = "1.0.130", features = ["derive"] }
-serde_json = "1.0.0"
+serde_json = "1.0.68"
 sha2 = "0.9"
 swirl = { git = "https://github.com/sgrif/swirl.git", rev = "e87cf37" }
 tar = "0.4.37"