Update memery requirement from 1.5.0 to 1.6.0 in /benchmarks

Updates the requirements on [memery](https://github.com/tycooon/memery) to permit the latest version.
- [Release notes](https://github.com/tycooon/memery/releases)
- [Commits](tycooon/memery@v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: memery
  dependency-type: direct:production
...

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

benchmarks/Gemfile

@@ -10,7 +10,7 @@ gem "benchmark-ips", "2.13.0"
 
 if RUBY_VERSION > "3"
   gem "dry-core", "1.0.1"
-  gem "memery", "1.5.0"
+  gem "memery", "1.6.0"
 else
   gem "ddmemoize", "1.0.0"
   gem "memoist", "0.16.2"