Clarify use of `x:type` label about docs

[ee7]

That sounds like the knowledge tag, not the type tag.

Ah, it looks like the fix for this issue involves changing the below. Currently, the description of x:knowledge and x:type is the same:

docs/product/tasks.md

Lines 33 to 35 in eb4abf3

	### Knowledge tag
	The `x:knowledge/<value>` labels describe how much Exercism knowledge is required by the contributor.

docs/product/tasks.md

Lines 70 to 72 in eb4abf3

	### Type tag
	The `x:type/<value>` labels describe how much Exercism knowledge is required by the contributor.

[iHiD]

The description of each x:type label might not convey the intention. The docs say that it "describes how much Exercism knowledge is required"

That sounds like the knowledge tag, not the type tag.

[iHiD]

It also seems like there is no x:module tag that can be applied to any configlet issue/PR,

We'll probably have a module/configlet tag that gets added automatically to all issues in this repo.