remove #readme from HOMEPAGE

addresses https://github.com/semantic-release/github/pull/419\#discussion_r720611427

Author: gr2m

lib/definitions/errors.js

@@ -2,7 +2,7 @@ import {inspect} from 'node:util';
 
 import {isString} from 'lodash-es';
 
-const HOMEPAGE = 'https://github.com/semantic-release/github#readme';
+const HOMEPAGE = 'https://github.com/semantic-release/github';
 
 const stringify = (object) =>
   isString(object) ? object : inspect(object, {breakLength: Number.POSITIVE_INFINITY, depth: 2, maxArrayLength: 5});