Fixed: URL linking to Square Developer dashboard in sandbox settings

[Prin-S]

All Submissions:

• [x] Does your code follow the WooCommerce Sniffs variant of WordPress coding standards?
• [n/a] Have you written new tests for your changes, as applicable?
• [n/a] Have you successfully run tests with your changes locally?
• [no] Will this change require new documentation or changes to existing documentation?

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Changes proposed in this Pull Request:

Change the URL for the My Applications link from https://squareupsandbox.com/dashboard/apps/my-applications to https://developer.squareup.com/console/en/apps.

Closes #209.

Steps to test the changes in this Pull Request:

1. Go to WooCommerce > Settings > Square > Settings.
2. For Environment Selection, choose Sandbox.
3. Scroll down to Sandbox Application ID.
4. Look for the My Applications link. Click on it.
5. The link now correctly directs to the Square Developer dashboard (https://developer.squareup.com/console/en/apps).

Changelog entry

Fix - URL linking to Square Developer dashboard in sandbox settings.

[qasumitbagthariya]

Regression / Smoke Test Report ✅

Tested with Archive File created via "php woorelease.phar build repo_URL" (Composer version 2.5.5, npm version 8.19.4, node version 16.20.0)

Status- Working expected with Plugin Archive/Zip file same as fix specific branch.

Next Step- Ready to Merge 🚀