Max CPU usage cannot be set, int is not valid, string expected

[pbksol]

Describe the bug

Go to Workflow settings and edit the field for max number of CPU cores. The setting is not saved.

This message will appear:

Argument #3 ($value) must be of type string, int given, called in /var/www/nextcloud/apps/workflow_ocr/lib/Service/GlobalSettingsService.php on line 72

System

• App version: 1.33.0
• Nextcloud version: 33.0.0
• PHP version: 8.4/8.5
• Environment: native Apache
• ocrmypdf version: 15.2.0+dfsg1

How to reproduce

Steps to reproduce the behavior:

Go to Workflow settings and edit the field for max number of CPU cores.