Update full-size-image-links.php

Typo

full-size-image-links/full-size-image-links.php

@@ -9,7 +9,7 @@ Author URI: https://meowapps.com
 Text Domain: full-size-image-links
 Domain Path: /languages
 
-:icensed under the MIT license:
+Licensed under the MIT license:
 http://www.opensource.org/licenses/mit-license.php
 */
 
@@ -111,4 +111,4 @@ class Full_Size_Image_Links {
 	}
 }
 
-?>
+?>