Bad accessible names on two image links

[MewenLeHo]

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

In https://boosted.orange.com/docs/5.3/examples/download-app/

Reduced test cases

Both image links have the same altternative text: alt="Get it on App Store" which lead to two accessibility issues:

• images containing text must have an alt attribute containing at least the text from the image
• make links explicit enough (here you have two links with the same accessible name)

What operating system(s) are you seeing the problem on?

Windows

What browser(s) are you seeing the problem on?

Chrome, Opera, Microsoft Edge, Firefox, Safari

What version of Boosted are you using?

v5.3.3