Document how to update dockerfile-json

Assisted-by: Claude
Signed-off-by: Adam Cmiel <acmiel@redhat.com>

Author: chmeliik

docs/build-and-test.md

@@ -70,3 +70,14 @@ go test ./pkg/commands
 
 Integration tests are located under `integration_tests` directory.
 Check [integration tests](/docs/integration-tests.md) doc for more information.
+
+## Updating the dockerfile-json dependency
+
+The `github.com/konflux-ci/dockerfile-json` dependency uses a replace
+directive in `go.mod` that points to a specific commit from the dev branch.
+Update to the latest version with:
+
+```bash
+go mod edit -replace github.com/keilerkonzept/dockerfile-json=github.com/konflux-ci/dockerfile-json@dev
+go mod tidy
+```