Bump tzinfo from 1.2.9 to 1.2.11 in /examples/simple_rails_api

Bumps [tzinfo](https://github.com/tzinfo/tzinfo) from 1.2.9 to 1.2.11.
- [Release notes](https://github.com/tzinfo/tzinfo/releases)
- [Changelog](https://github.com/tzinfo/tzinfo/blob/master/CHANGES.md)
- [Commits](tzinfo/tzinfo@v1.2.9...v1.2.11)

---
updated-dependencies:
- dependency-name: tzinfo
  dependency-type: indirect
...

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

Author: dependabot[bot]

examples/simple_rails_api/Gemfile.lock

@@ -136,7 +136,7 @@ GEM
     sqlite3 (1.4.2)
     thor (1.1.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.9)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)