🐛 Fix numbering, update missing link.

Thanks @colliand

docs/meps/mep-0002.md

@@ -232,11 +232,11 @@ In both cases, the template can be escaped with a preceding backslash, that is `
 #### `link`
 
 The links are defined by a scheme, which can be standard protocols (`http:`, `mailto:`).
-Here we propose three new schemes, `path` and `project` which is an extensibility point described by [CommonMark](https://spec.commonmark.org/0.30/#example-598).
-These schemes are used to indicate that the link should be resolved by MyST specific logic, and follows standard [URI][uri] syntax:
+Here we propose two new schemes, `path` and `project` which is an extensibility point described by [CommonMark](https://spec.commonmark.org/0.30/#example-598).
+These schemes are used to indicate that the link should be resolved by MyST specific logic, and follows standard [URI](https://en.wikipedia.org/wiki/Uniform_Resource_Identifier) syntax:
 
 ```text
-URI = scheme ":" pathname ["?" query] "#" fragment
+URI = scheme ":" pathname ["?" query] ["#" fragment]
 ```
 
 In most cases, as seen in the summary above the scheme is optional and can be inferred safely by the context.