[Security] Bump rack-cors from 1.0.3 to 1.0.5

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 1.0.3 to 1.0.5. **This update includes a security fix.**
- [Release notes](https://github.com/cyu/rack-cors/releases)
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG.md)
- [Commits](cyu/rack-cors@v1.0.3...v1.0.5)

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

Gemfile.lock

@@ -226,7 +226,8 @@ GEM
     puma (4.3.1)
       nio4r (~> 2.0)
     rack (2.0.8)
-    rack-cors (1.0.3)
+    rack-cors (1.0.5)
+      rack (>= 1.6.0)
     rack-mini-profiler (1.1.3)
       rack (>= 1.2.0)
     rack-protection (2.0.7)