Bump listen from 3.9.0 to 3.10.0 in /demo

Bumps [listen](https://github.com/guard/listen) from 3.9.0 to 3.10.0.
- [Release notes](https://github.com/guard/listen/releases)
- [Commits](guard/listen@v3.9.0...v3.10.0)

---
updated-dependencies:
- dependency-name: listen
  dependency-version: 3.10.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

demo/Gemfile.lock

@@ -196,7 +196,8 @@ GEM
     kuby-kind (0.2.4)
       kind-rb (~> 0.1)
       kuby-core (>= 0.16.0, < 1.0)
-    listen (3.9.0)
+    listen (3.10.0)
+      logger
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     llhttp-ffi (0.5.0)