Bump ostruct from 0.6.1 to 0.6.3 in /graph-sample

Bumps [ostruct](https://github.com/ruby/ostruct) from 0.6.1 to 0.6.3.
- [Release notes](https://github.com/ruby/ostruct/releases)
- [Commits](ruby/ostruct@v0.6.1...v0.6.3)

---
updated-dependencies:
- dependency-name: ostruct
  dependency-version: 0.6.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

graph-sample/Gemfile

@@ -80,4 +80,4 @@ gem 'httparty', '~> 0.23.1'
 # Session storage in database
 gem 'activerecord-session_store', '~> 2.2.0'
 
-gem "ostruct", "~> 0.6.1"
+gem "ostruct", "~> 0.6.3"

graph-sample/Gemfile.lock

@@ -184,7 +184,7 @@ GEM
     omniauth-rails_csrf_protection (1.0.2)
       actionpack (>= 4.2)
       omniauth (~> 2.0)
-    ostruct (0.6.1)
+    ostruct (0.6.3)
     pp (0.6.2)
       prettyprint
     prettyprint (0.2.0)
@@ -302,7 +302,7 @@ DEPENDENCIES
   jbuilder
   omniauth-oauth2 (~> 1.8.0)
   omniauth-rails_csrf_protection (~> 1.0.2)
-  ostruct (~> 0.6.1)
+  ostruct (~> 0.6.3)
   puma (~> 6.6)
   rails (~> 7.2.2)
   selenium-webdriver