radicle/web: Fix schema of `Config::description`

The JSON Schema for the field `radicle::web::Config::description` is specified
to be a URI, which is wrong.

Remove the additional attribute.

crates/radicle-cli/examples/rad-config.md

@@ -141,8 +141,7 @@ $ rad config schema
           "type": [
             "string",
             "null"
-          ],
-          "format": "uri"
+          ]
         }
       }
     },

crates/radicle/src/web.rs

@@ -25,7 +25,6 @@ pub struct Config {
     pub avatar_url: Option<String>,
     /// Node description.
     #[serde(default, skip_serializing_if = "Option::is_none")]
-    #[cfg_attr(feature = "schemars", schemars(url))]
     pub description: Option<String>,
 }