Maintenance: Bump dalli from 3.1.5 to 3.1.6

Bumps [dalli](https://github.com/petergoldstein/dalli) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/petergoldstein/dalli/releases)
- [Changelog](https://github.com/petergoldstein/dalli/blob/main/History.md)
- [Commits](https://github.com/petergoldstein/dalli/compare/v3.1.5...v3.1.6)

Gemfile.lock

@@ -170,7 +170,7 @@ GEM
     crass (1.0.6)
     csv (3.2.2)
     daemons (1.4.1)
-    dalli (3.1.5)
+    dalli (3.1.6)
     debug_inspector (1.1.0)
     delayed_job (4.1.9)
       activesupport (>= 3.0, < 6.2)