update: newsletter api endpoint and payload

[ankyc-phi]

Includes:

• changed base uri, and updated api key
• updated form payload (+ country, - date)
• request payload and headers updated
• base uri is using the reverse proxy cdn setup

Jira Issues:
https://pethealthinc.atlassian.net/browse/PM-143

Related: #405

Test URLs:

• Before: https://main--petplace--hlxsites.hlx.page/
• After:
  • https://feat-update-newsletter-api--petplace--hlxsites.hlx.live/
  • https://feat-update-newsletter-api--petplace--hlxsites.hlx.live/?martech=off

[aem-code-sync]

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Commits

• 2e282d4 ✅ (latest)
• 0ed19b2 ✅
• a31d83d ✅
• 72b2e18 ✅
• 7139e61 ✅
• f6e8eff ✅
• d3d115b ✅
• b7f94bf ✅
• 204b662 ✅
• dc2403e ✅
• 6333075 ✅
• 0360b3a ✅
• bb129ae ✅
• 876709e ✅

[aem-code-sync]

Page	Scores	Audits	Google
/
/?martech=off

[ramboz]

Instrumentation looks good, but we need to look into the CORS issues and get those resolved if we don't want to lose current capabilities.

[ankyc-phi]

hoping to push this in by end of day, just fixed linting errors and merged the base branch

[ankyc-phi]

pushing this live now, already approved and passed linting