Updated all the references from ARIA 1.1 to 1.2

[i01000001]

The rules has references to ARIA 1.1 in text and as links I have updated all of the text and links to reflect for ARIA 1.2

Closes issue(s):

• closes #1867

Need for Call for Review: This will require a 2 weeks Call for Review

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[tombrunet]

It seems this PR shows several changes that have already been made, which makes it difficult to see what the actual change is. You may need to update some branches.

[carlosapaduarte]

Superseded by #1951