Bump bootsnap from 1.5.1 to 1.6.0 (#12463)

Bumps [bootsnap](https://github.com/Shopify/bootsnap) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/Shopify/bootsnap/releases)
- [Changelog](https://github.com/Shopify/bootsnap/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Shopify/bootsnap/compare/v1.5.1...v1.6.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -131,7 +131,7 @@ GEM
       chartkick (>= 3.2)
       railties (>= 5)
       safely_block (>= 0.1.1)
-    bootsnap (1.5.1)
+    bootsnap (1.6.0)
       msgpack (~> 1.0)
     brakeman (5.0.0)
     browser (5.2.0)
@@ -456,7 +456,7 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.5.0)
     minitest (5.14.3)
-    msgpack (1.3.3)
+    msgpack (1.4.1)
     multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)