⬆️ Bump logger from 1.6.3 to 1.6.4

Bumps [logger](https://github.com/ruby/logger) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/ruby/logger/releases)
- [Commits](ruby/logger@v1.6.3...v1.6.4)

---
updated-dependencies:
- dependency-name: logger
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -326,7 +326,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     locale (2.1.4)
     lockbox (1.4.1)
-    logger (1.6.3)
+    logger (1.6.4)
     lograge (0.14.0)
       actionpack (>= 4)
       activesupport (>= 4)