Ensure tag appears first on docblock line

Co-authored-by: Miguel Muscat <miguelmuscat93@gmail.com>

src/TaggingServiceProvider.php

@@ -113,7 +113,7 @@ protected function indexTags(): void
      */
     protected function getTagsFromDocBlock(string $docBlock): array
     {
-        $regex = '#(@tag\s*(?P<tags>[^\s]+))#';
+        $regex = '#^\s*/?\**\s*(@tag\s*(?P<tags>[^\s]+))#m';
         preg_match_all($regex, $docBlock, $matches);
 
         return $matches['tags'];