Updates to make hyper-schema fixes/additions available

Author: jdesrosiers

.gitmodules

@@ -26,6 +26,7 @@
 [submodule "_includes/draft/2019-09"]
 	path = _includes/draft/2019-09
 	url = https://github.com/json-schema-org/json-schema-spec.git
+	branch = 2019-09
 [submodule "_includes/draft/2020-12"]
 	path = _includes/draft/2020-12
 	url = https://github.com/json-schema-org/json-schema-spec.git

_includes/draft/2019-09

@@ -293,6 +293,7 @@ For links to the somewhat more readably formatted versions on this web site, and
     - Relative JSON Pointer: [draft-bhutton-relative-json-pointer-00](https://tools.ietf.org/html/draft-bhutton-relative-json-pointer-00) ([changes](https://tools.ietf.org/html/draft-bhutton-relative-json-pointer-00#appendix-A))
 - General use meta-schemas
     - [JSON Schema meta-schema](draft/2020-12/schema)
+    - [JSON Hyper-Schema meta-schema](draft/2020-12/hyper-schema) (2019-09 Hyper-Schema with 2020-12 Validation)
 - Individual vocabulary meta-schemas
   - [Core Vocabulary meta-schema](draft/2020-12/meta/core)
   - [Applicator Vocabulary meta-schema](draft/2020-12/meta/applicator)

_includes/draft/2020-12

@@ -42,6 +42,7 @@ Please note, additional vocabulary specific schema files are needed to fully con
 
 |--------------------------------------------------------------|------------------------------------------------------------|
 | [Core/Validation Dialect meta-schema](draft/2020-12/schema)  | Used for schemas written for pure validation.              |
+| [Hyper-Schema Dialect meta-schema](draft/2020-12/hyper-schema) | Used for schemas written for validation (2020-12) and hyper-linking (2019-09).|
 | [Recommended Output meta-schema](draft/2020-12/output/schema)| Recommended output structure of the application process.   |
 
 ## Single-vocabulary meta-schemas