Bump rack in /corese-unit-test/src/test/resources/data/rdf-star-main

Bumps [rack](https://github.com/rack/rack) from 2.2.3 to 2.2.6.4.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.2.3...v2.2.6.4)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
...

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

Author: dependabot[bot]

corese-unit-test/src/test/resources/data/rdf-star-main/Gemfile.lock

@@ -44,7 +44,7 @@ GEM
     multi_json (1.15.0)
     net-http-persistent (4.0.1)
       connection_pool (~> 2.2)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rake (13.0.6)
     rdf (3.1.15)
       hamster (~> 3.0)