Bump bootsnap from 1.18.4 to 1.18.6

Bumps [bootsnap](https://github.com/Shopify/bootsnap) from 1.18.4 to 1.18.6.
- [Changelog](https://github.com/rails/bootsnap/blob/main/CHANGELOG.md)
- [Commits](rails/bootsnap@v1.18.4...v1.18.6)

---
updated-dependencies:
- dependency-name: bootsnap
  dependency-version: 1.18.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
     bindex (0.8.1)
     binding_of_caller (1.0.1)
       debug_inspector (>= 1.2.0)
-    bootsnap (1.18.4)
+    bootsnap (1.18.6)
       msgpack (~> 1.2)
     bootstrap-multiselect-rails (0.9.9)
       rails (>= 4.0.0)