Misleading error about relative link in errors.txt about yii2-apidoc

[samdark]

Interesting. The link is definitely not relative.

[arogachev]

Yep, need to recheck #256. Not critical though, as I see.

[WinterSilence]

@arogachev api mark all absolute links as relative when $repoUrl is not set:

[12] => Array(
  [line] => 
  [file] => 
  [message] => Using relative link (https://github.com/yiisoft/yii2/blob/2.0.13/framework/UPGRADE.md#upgrade-from-yii-2012) but repoUrl is not set.
    )
[13] => Array(
  [line] => 
  [file] => 
  [message] => Using relative link (https://www.php.net/manual/en/function.hash-algos.php) but repoUrl is not set.
)
[14] => Array(
  [line] => 
  [file] => 
  [message] => Using relative link (https://www.php.net/manual/en/function.hash-algos.php) but repoUrl is not set.
)