build(deps): bump wagmi from 2.12.25 to 2.15.0 in /apps/example

Bumps [wagmi](https://github.com/wevm/wagmi/tree/HEAD/packages/react) from 2.12.25 to 2.15.0.
- [Release notes](https://github.com/wevm/wagmi/releases)
- [Changelog](https://github.com/wevm/wagmi/blob/main/packages/react/CHANGELOG.md)
- [Commits](https://github.com/wevm/wagmi/commits/[email protected]/packages/react)

---
updated-dependencies:
- dependency-name: wagmi
  dependency-version: 2.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

apps/example/package.json

@@ -37,7 +37,7 @@
     "tailwindcss-animate": "^1.0.7",
     "usehooks-ts": "^3.1.0",
     "viem": "^2.20.1",
-    "wagmi": "^2.12.25"
+    "wagmi": "^2.15.0"
   },
   "devDependencies": {
     "@across-toolkit/eslint-config": "workspace:*",