fix(deps): update rust crate serde_json to 1.0.75

Author: renovate-bot

Diff for: Cargo.toml

@@ -38,7 +38,7 @@ bytes = "1.1.0"
 mime = "0.3.16"
 form-data = { version = "0.3.2", optional = true }
 serde = { version = "1.0.130", optional = true }
-serde_json = { version = "1.0.71", optional = true }
+serde_json = { version = "1.0.75", optional = true }
 serde_urlencoded = { version = "0.7.0", optional = true }
 cookie = { version = "0.15.1", features = ["percent-encode"], optional = true }