Bump tzinfo from 2.0.4 to 2.0.6 in /spec/fixtures/test_site

Bumps [tzinfo](https://github.com/tzinfo/tzinfo) from 2.0.4 to 2.0.6.
- [Release notes](https://github.com/tzinfo/tzinfo/releases)
- [Changelog](https://github.com/tzinfo/tzinfo/blob/master/CHANGES.md)
- [Commits](tzinfo/tzinfo@v2.0.4...v2.0.6)

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

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

spec/fixtures/test_site/Gemfile.lock

@@ -75,7 +75,7 @@ GEM
       rake (>= 10.0.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
-    tzinfo (2.0.4)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     tzinfo-data (1.2023.3)
       tzinfo (>= 1.0.0)