Release of 3.6.4

= 3.6.4       - 05-11-2026
* Enhance 	  - Improved handling of signature files in email notification attachments.
* Fix 		  - Improved security of form data exposed in the block editor and email preview.
* Fix 		  - Improved security of form editing permissions and custom CSS/JS output.
* Fix 		  - Custom JavaScript containing double quotes did not run on the form page.