Moved Failed Example 4 into Passed Example 9 in HTML images contain no text [0va7u6]

[giacomo-petri]

Closes issue(s): #2397

This PR moves failed example 4 to passing example 9, as SC 1.4.5 Images of Text clearly states in its note that when the same information conveyed by an image of text is also available as real text, the requirement is satisfied.

Need for Call for Review:
This will require a 1 week Call for Review

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