如何更改Yoast SEO标题标签的帖子自定义分类中的“逗号”（默认情况下以逗号分隔）？

I am using Yoast SEO plugin in my wordpress website and I am pretty new in php and all this.

I would like to add a custom taxonomy in the title tags of my pages. This taxonomy contains maximum of two terms for a single page, but Yoast SEO separates the terms with "comma" by default.

I would like to know where and how I can change this setting. I have looked into the php files of the plugin, but I couldn't do it.

Thanks in advance.