chore: remove extra lines, fix markdown lint

spec/asyncapi.md

@@ -273,7 +273,6 @@ This object MAY be extended with [Specification Extensions](#specificationExtens
 
 ##### Info Object Example
 
-
 <!-- asyncapi-example-tester:{"name":"Info Object","json_path":"$.info"} -->
 ```json
 {
@@ -344,7 +343,6 @@ This object MAY be extended with [Specification Extensions](#specificationExtens
 }
 ```
 
-
 ```yaml
 name: API Support
 url: https://www.example.com/support
@@ -374,7 +372,6 @@ This object MAY be extended with [Specification Extensions](#specificationExtens
 }
 ```
 
-
 ```yaml
 name: Apache 2.0
 url: https://www.apache.org/licenses/LICENSE-2.0.html
@@ -796,7 +793,6 @@ Field Pattern | Type | Description
 }
 ```
 
-
 ```yaml
 onUserSignUp:
   title: User sign up
@@ -2689,4 +2685,4 @@ binary | `string` | `binary` | any sequence of octets
 boolean | `boolean` | | |
 date | `string` | `date` | As defined by `full-date` - [RFC3339](https://www.rfc-editor.org/rfc/rfc3339.html#section-5.6)
 dateTime | `string` | `date-time` | As defined by `date-time` - [RFC3339](https://www.rfc-editor.org/rfc/rfc3339.html#section-5.6)
-password | `string` | `password` | Used to hint UIs the input needs to be obscured.
+password | `string` | `password` | Used to hint UIs the input needs to be obscured.