Fix: Use dangerouslySetInnerHTML to set attribution text in image.jsx (fixes #544)

[swashbuck]

Fix #544

Fix

• Use dangerouslySetInnerHTML to set the attribution text in image.jsx
• Compile attribution text so that we can use helpers

Testing

1. In a Graphic component, set the _graphic.attribution value to:

{{a11y_alt_text '$5bn' 'five billion dollars'}}

2. The attribution text should read $5bn with a hidden aria-label of five billion dollars

<span class="component__attribution graphic__attribution">
  <span class="component__attribution-inner graphic__attribution-inner">
    <span aria-hidden="true">$5bn</span>
    <span class="aria-label">five billion dollars</span>
  </span>
</span>

[oliverfoster]

:tada: This PR is included in version 6.46.11 :tada:

The release is available on GitHub release

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