Update to sb-chart-block v1.3.0 for improved compatibility with the WordPress 6.7 site editor.

Changes
| Change | Reference |
|---|---|
| Changed: Avoid unexpected reporting of “The following has been modified” from the site editor | bobbingwide/sb-chart-block#37 |
Tested
- Tested: With WordPress 6.7.1 and WordPress Multisite
- Tested: With PHP 8.3
- Tested: With PHPUnit 9.6
