Style fix

Author: multiplemonomials

storage/filesystem/littlefsv2/include/littlefsv2/LittleFileSystem2.h

@@ -290,7 +290,7 @@ class LittleFileSystem2 : public mbed::FileSystem {
 
 private:
     lfs2_t _lfs{}; // The actual file system
-    struct lfs2_config _config{};
+    struct lfs2_config _config {};
     mbed::BlockDevice *_bd = nullptr; // The block device
 
     // thread-safe locking