chore!: Use serde_json::Value instead of String for user-provided JSON configOverrides (#831)

* chore!: Use serde_json::Value instead of String for user-provided JSON configOverrides

* changelog

* Update link

Author: sbernauer

CHANGELOG.md

@@ -7,7 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Added
 
 - BREAKING: Add required CLI argument and env var to set the image repository used to construct final product image names: `IMAGE_REPOSITORY` (`--image-repository`), eg. `oci.example.org/my/namespace` ([#830]).
-- Support `configOverrides` for `config.json` ([#818]).
+- Support `configOverrides` for `config.json` ([#818], [#831]).
 
 ### Changed
 
@@ -20,6 +20,7 @@ All notable changes to this project will be documented in this file.
 [#819]: https://github.com/stackabletech/opa-operator/pull/819
 [#820]: https://github.com/stackabletech/opa-operator/pull/820
 [#830]: https://github.com/stackabletech/opa-operator/pull/830
+[#831]: https://github.com/stackabletech/opa-operator/pull/831
 
 ## [26.3.0] - 2026-03-16