chore(deps): bump puma from 5.6.7 to 5.6.8 in /examples/rails-react-app

Bumps [puma](https://github.com/puma/puma) from 5.6.7 to 5.6.8.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v5.6.7...v5.6.8)

---
updated-dependencies:
- dependency-name: puma
  dependency-type: direct:production
...

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

examples/rails-react-app/Gemfile.lock

@@ -4,7 +4,7 @@ PATH
     isorun (0.1.13)
       railties (>= 6.0.0)
       rake (~> 13.0)
-      rb_sys (~> 0.9.46)
+      rb_sys (~> 0.9.81)
 
 GEM
   remote: https://rubygems.org/
@@ -152,13 +152,13 @@ GEM
       timeout
     net-smtp (0.3.3)
       net-protocol
-    nio4r (2.5.9)
+    nio4r (2.7.0)
     nokogiri (1.14.3-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.14.3-x86_64-linux)
       racc (~> 1.4)
     public_suffix (5.0.1)
-    puma (5.6.7)
+    puma (5.6.8)
       nio4r (~> 2.0)
     racc (1.6.2)
     rack (2.2.6.4)
@@ -193,7 +193,7 @@ GEM
       thor (~> 1.0)
       zeitwerk (~> 2.5)
     rake (13.0.6)
-    rb_sys (0.9.72)
+    rb_sys (0.9.86)
     redis (4.8.1)
     regexp_parser (2.7.0)
     reline (0.3.3)