chore(deps-dev): bump @percy/cli from 1.17.0 to 1.21.0 (#6439)

Bumps [@percy/cli](https://github.com/percy/cli/tree/HEAD/packages/cli) from 1.17.0 to 1.21.0.
- [Release notes](https://github.com/percy/cli/releases)
- [Commits](https://github.com/percy/cli/commits/v1.21.0/packages/cli)

---
updated-dependencies:
- dependency-name: "@percy/cli"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jesse Mazzella <ozyx@users.noreply.github.com>

package.json

@@ -5,7 +5,7 @@
   "devDependencies": {
     "@babel/eslint-parser": "7.18.9",
     "@braintree/sanitize-url": "6.0.2",
-    "@percy/cli": "1.17.0",
+    "@percy/cli": "1.21.0",
     "@percy/playwright": "1.0.4",
     "@playwright/test": "1.29.0",
     "@types/eventemitter3": "1.2.0",