Bump flipper-ui from 1.3.4 to 1.3.6 (#5347)

Bumps [flipper-ui](https://github.com/flippercloud/flipper) from 1.3.4 to 1.3.6.
- [Release notes](https://github.com/flippercloud/flipper/releases)
- [Changelog](https://github.com/flippercloud/flipper/blob/main/Changelog.md)
- [Commits](flippercloud/flipper@v1.3.4...v1.3.6)

---
updated-dependencies:
- dependency-name: flipper-ui
  dependency-version: 1.3.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -285,9 +285,9 @@ GEM
     flipper-active_record (1.3.6)
       activerecord (>= 4.2, < 9)
       flipper (~> 1.3.6)
-    flipper-ui (1.3.4)
+    flipper-ui (1.3.6)
       erubi (>= 1.0.0, < 2.0.0)
-      flipper (~> 1.3.4)
+      flipper (~> 1.3.6)
       rack (>= 1.4, < 4)
       rack-protection (>= 1.5.3, < 5.0.0)
       rack-session (>= 1.0.2, < 3.0.0)
@@ -515,7 +515,7 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.2.0)
+    rack (3.2.1)
     rack-mini-profiler (4.0.1)
       rack (>= 1.2.0)
     rack-protection (4.1.1)