In Jekyll - get the parent url path of a collection with concatenation

First, you need to access the collection's path using the collection.docs method. Then, you can extract the path of the first document within the collection using the first.url method. After that, you can use the split method to separate the URL into an array of its parts based on the "/" delimiter. Finally, you can use the join method to concatenate the parts of the URL array, excluding the last element, to obtain the parent URL path of the collection.