Fix broken links

readme.md

@@ -64,7 +64,7 @@ Type: `object`
 
 [JSON Schema](https://json-schema.org) to validate your config data.
 
-Under the hood, the JSON Schema validator [ajv](https://github.com/epoberezkin/ajv) is used to validate your config. We use [JSON Schema draft-07](https://json-schema.org/latest/json-schema-validation.html) and support all [validation keywords](https://github.com/epoberezkin/ajv/blob/master/KEYWORDS.md) and [formats](https://github.com/epoberezkin/ajv#formats).
+Under the hood, the JSON Schema validator [ajv](https://ajv.js.org/json-schema.html) is used to validate your config. We use [JSON Schema draft-2020-12](https://json-schema.org/draft/2020-12/release-notes) and support all validation keywords and formats.
 
 You should define your schema as an object where each key is the name of your data's property and each value is a JSON schema used to validate that property. See more [here](https://json-schema.org/understanding-json-schema/reference/object.html#properties).