Removed fixed schemars version (#418)

## Description



Co-authored-by: Malte Sander <malte.sander.it@gmail.com>

Author: maltesander

Cargo.toml

@@ -20,7 +20,7 @@ lazy_static = "1.4.0"
 product-config = { git = "https://github.com/stackabletech/product-config.git", tag = "0.4.0" }
 rand = "0.8.5"
 regex = "1.5.6"
-schemars = "=0.8.10" # https://github.com/GREsau/schemars/pull/83 (in 0.8.9) introduces problems with #derive(JsonSchema) and generics. See https://github.com/GREsau/schemars/issues/144
+schemars = "0.8.10"
 serde = { version = "1.0.137", features = ["derive"] }
 serde_json = "1.0.81"
 serde_yaml = "0.8.24"