style: fix styling

Author: tpetry

src/Schema/Grammars/GrammarIndex.php

@@ -147,7 +147,7 @@ private function genericCompileCreateIndex(Blueprint $blueprint, Fluent $command
             // In case index parameters are provided the column needs to escaped correctly and the rest is provided
             // exactly as provided.
             $parts = explode(' ', $column, 2);
-            $column = trim(sprintf('%s %s', $this->wrap($parts[0]), $parts[1] ?? ''));
+            $column = trim(\sprintf('%s %s', $this->wrap($parts[0]), $parts[1] ?? ''));
 
             return $column;
         }, $command['columns']);