fix: annotation at the end

Author: hitblast

book/src/references/license.md

@@ -1,7 +1,7 @@
 # License
 
 This project is licensed permissively and will remain free forever. You may follow by the rules
-and regulations covered by the license when modifying, redistributing, or using cutler.\
+and regulations covered by the license when modifying, redistributing, or using cutler.
 
 - [LICENSE-APACHE](https://github.com/cutlerCLI/cutler/blob/master/LICENSE-APACHE)
 - [LICENSE-MIT](https://github.com/cutlerCLI/cutler/blob/master/LICENSE-MIT)