chore(deps): bump @stellar/stellar-sdk from 14.6.1 to 15.0.1

Bumps [@stellar/stellar-sdk](https://github.com/stellar/js-stellar-sdk) from 14.6.1 to 15.0.1.
- [Release notes](https://github.com/stellar/js-stellar-sdk/releases)
- [Changelog](https://github.com/stellar/js-stellar-sdk/blob/master/CHANGELOG.md)
- [Commits](stellar/js-stellar-sdk@v14.6.1...v15.0.1)

---
updated-dependencies:
- dependency-name: "@stellar/stellar-sdk"
  dependency-version: 15.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -36,7 +36,7 @@
   "dependencies": {
     "@creit.tech/stellar-wallets-kit": "^2.0.1",
     "@stellar/design-system": "^3.2.7",
-    "@stellar/stellar-sdk": "^14.4.3",
+    "@stellar/stellar-sdk": "^15.0.1",
     "@stellar/stellar-xdr-json": "^23.0.0",
     "@tailwindcss/vite": "^4.2.2",
     "@tanstack/react-query": "^5.90.17",