build(deps): bump amis-ui from 2.9.0 to 6.8.0

Bumps amis-ui from 2.9.0 to 6.8.0.

---
updated-dependencies:
- dependency-name: amis-ui
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -37,7 +37,7 @@
     "amis": "2.2.0",
     "amis-editor": "5.2.0",
     "amis-formula": "^2.2.0",
-    "amis-ui": "^2.2.0",
+    "amis-ui": "^6.8.0",
     "axios": "^0.27.2",
     "compression-webpack-plugin": "6.1.1",
     "conventional-changelog-cli": "^2.2.2",