docs: fixed links to oas spec page (#728)

README.md

@@ -205,7 +205,7 @@ Also you may rewrite some predefined environment variables defined in [Dockerfil
 You can inject Security Definitions widget into any place of your specification `description`. Check out details [here](docs/security-definitions-injection.md).
 
 ### Swagger vendor extensions
-ReDoc makes use of the following [vendor extensions](http://swagger.io/specification/#vendorExtensions):
+ReDoc makes use of the following [vendor extensions](https://swagger.io/specification/#specificationExtensions):
 * [`x-logo`](docs/redoc-vendor-extensions.md#x-logo) - is used to specify API logo
 * [`x-traitTag`](docs/redoc-vendor-extensions.md#x-traitTag) - useful for handling out common things like Pagination, Rate-Limits, etc
 * [`x-code-samples`](docs/redoc-vendor-extensions.md#x-code-samples) - specify operation code samples

docs/redoc-vendor-extensions.md

@@ -1,10 +1,10 @@
 # ReDoc vendor extensions
-ReDoc makes use of the following [vendor extensions](http://swagger.io/specification/#vendorExtensions)
+ReDoc makes use of the following [vendor extensions](https://swagger.io/specification/#specificationExtensions)
 
 ### Swagger Object vendor extensions
-Extend OpenAPI root [Swagger Object](http://swagger.io/specification/#swaggerObject)
+Extend OpenAPI root [Swagger Object](https://swagger.io/specification/#oasObject)
 #### x-servers
-Backported from OpenAPI 3.0 [`servers`](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#server-object). Currently doesn't support templates.
+Backported from OpenAPI 3.0 [`servers`](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.0.md#server-object). Currently doesn't support templates.
 
 #### x-tagGroups
 
@@ -206,7 +206,7 @@ Extends OpenAPI [Parameter Object](http://swagger.io/specification/#parameterObj
 `x-examples` are rendered in the JSON tab on the right panel of ReDoc.
 
 ### Response Object vendor extensions
-Extends OpenAPI [Response Object](https://swagger.io/specification/#responseObject)
+Extends OpenAPI [Response Object](https://swagger.io/specification/#requestBodyObject)
 
 #### x-summary
 | Field Name     |	Type	  | Description |