Add yj-schema-validator and spring-boot-config-json-schema to the tooling listing

[alexmond]

Two open-source Java JSON Schema tools to add to the tooling listing (data/tooling-data.yaml):

• yj-schema-validator — a CLI to validate YAML/JSON files against a JSON Schema, with colored, JSON, and JUnit report output. Built on the networknt json-schema-validator (drafts 4/6/7/2019-09/2020-12). https://github.com/alexmond/yj-schema-validator
• spring-boot-config-json-schema — a Spring Boot starter that generates JSON Schema (2020-12) from @ConfigurationProperties, for IDE autocomplete and CI validation of application.yml / .properties. https://github.com/alexmond/spring-boot-config-json-schema

Both are Apache-2.0 (Maven Central group org.alexmond). PR to follow.