docs: update relative links to api docs (#1303)

apps/generator/docs/hooks.md

@@ -8,9 +8,9 @@ The following types of hooks are currently supported:
 
 |Hook type|Description| Return type | Arguments 
 |---|---|---|---|
-| `generate:before` | Called after registration of all filters and before the generator starts processing of the template. | void : Nothing is expected to be returned. | [The generator instance](https://github.com/asyncapi/generator/blob/master/docs/api.md)
-| `generate:after` | Called at the very end of the generation. | void : Nothing is expected to be returned. | [The generator instance](https://github.com/asyncapi/generator/blob/master/docs/api.md)
-| `setFileTemplateName ` | Called right before saving a new file generated by [file template](./file-templates.md). | string : a new filename for the generator to use for the file template. | [The generator instance](https://github.com/asyncapi/generator/blob/master/docs/api.md) and object in the form of `{ "originalFilename" : string }`
+| `generate:before` | Called after registration of all filters and before the generator starts processing of the template. | void : Nothing is expected to be returned. | [The generator instance](/api)
+| `generate:after` | Called at the very end of the generation. | void : Nothing is expected to be returned. | [The generator instance](/api)
+| `setFileTemplateName ` | Called right before saving a new file generated by [file template](./file-templates.md). | string : a new filename for the generator to use for the file template. | [The generator instance](/api) and object in the form of `{ "originalFilename" : string }`
 
 The generator parses:
 - All the files in the `.hooks` directory inside the template.