use correct ascii code representation of project name

In the ever-evolving landscape of code, there are changes that matter,
and then there are those that REALLY matter. Today, we embark on one
such monumental change. The ASCII art at the top of our "trurl" project
has, for far too long, lived under the shadow of "curl." This was a
grievous oversight, a betrayal of the very essence of our project’s
identity.

No longer will our headers deceive the eye and confuse the heart. The
mighty "trurl" shall now stand tall, proudly etched in ASCII glory,
leading our code to new heights of brand alignment and developer
satisfaction. Future generations will look back at this moment and say,
"Yes, this was the commit that truly mattered."

trurl.c

@@ -1,9 +1,9 @@
 /***************************************************************************
- *                                  _   _ ____  _
- *  Project                     ___| | | |  _ \| |
- *                             / __| | | | |_) | |
- *                            | (__| |_| |  _ <| |___
- *                             \___|\___/|_| \_\_____|
+ *                             _                   _
+ *  Project                   | |_ _ __ _   _ _ __| |
+ *                            | __| '__| | | | '__| |
+ *                            | |_| |  | |_| | |  | |
+ *                             \__|_|   \__,_|_|  |_|
  *
  * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
  *