Change 'test cases' to 'examples' as required by ACT Rules Format 1.1

[daniel-montalvo]

The format now says that the test cases should be named examples, and it has a MUST on it, so we should do this before attempting to transition to REC.

Closes issue(s):

• closes Not all rules "Test cases" have been renamed to "examples" w3c/wcag-act#609

Need for Call for Review:
This will require a 1-week call for review (changes the name of one of the key sections of our rules).

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[kengdoj]

I left some suggestions. Some are changes to path which I'm not sure of so please review.

Thanks for picking these ones up @kengdoj

[WilcoFiers]

These changes look good to me, but I think we probably should do at least a 1-week call for review for this.

The review period has been updated.

[zlayaAvocado]

are we also changing testcase (with no space) to example?

[WilcoFiers]

@daniel-montalvo can you look at this. Discussed on the call, we can do this in a separate PR too if you prefer.

[zlayaAvocado]

just one non blocking comment