[amp-story-shopping] Make call to action case consistent #38082
Description
Description
The current CTA text is Shop Now while the amp-story-outlink and amp-story-attachment CTAs are Swipe up.
Ideally Shop Now is renamed to Shop now
Reproduction Steps
Add a shopping tag to a page
Relevant Logs
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Browser(s) Affected
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OS(s) Affected
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Device(s) Affected
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AMP Version Affected
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