Bump rack-cors from 1.0.2 to 1.0.3

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 1.0.2 to 1.0.3.
- [Release notes](https://github.com/cyu/rack-cors/releases)
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG.md)
- [Commits](cyu/rack-cors@v1.0.2...v1.0.3)

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

Gemfile.lock

@@ -233,7 +233,7 @@ GEM
     public_suffix (3.0.3)
     puma (3.12.1)
     rack (2.0.6)
-    rack-cors (1.0.2)
+    rack-cors (1.0.3)
     rack-link_headers (2.2.2)
       rack
     rack-test (1.1.0)