corrige une typo

src/Service/SourceGenerator.php

@@ -17,7 +17,7 @@ class SourceGenerator
         $parts[] = $task->getName();
 
         foreach (explode(' ', $project->getHashtags()) as $hashtag) {
-            $parts[] = $hashtag;
+            $parts[] = '#'.$hashtag;
         }
 
         $source = implode(' ', $parts);