Bump bootstrap from 4.5.3 to 4.6.0

Bumps [bootstrap](https://github.com/twbs/bootstrap-rubygem) from 4.5.3 to 4.6.0.
- [Release notes](https://github.com/twbs/bootstrap-rubygem/releases)
- [Changelog](https://github.com/twbs/bootstrap-rubygem/blob/master/CHANGELOG.md)
- [Commits](twbs/bootstrap-rubygem@v4.5.3...v4.6.0)

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

Author: dependabot-preview[bot]

Gemfile

@@ -4,7 +4,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 ruby "2.7.2"
 
 gem "bootsnap", ">= 1.1.0", require: false
-gem "bootstrap", "~> 4.5.3"
+gem "bootstrap", "~> 4.6.0"
 gem "bugsnag"
 gem "devise"
 gem "devise_invitable"

Gemfile.lock

@@ -64,7 +64,7 @@ GEM
       activerecord (>= 3.2, < 7.0)
       rake (>= 10.4, < 14.0)
     ast (2.4.1)
-    autoprefixer-rails (10.0.1.3)
+    autoprefixer-rails (10.2.0.0)
       execjs
     bcrypt (3.1.16)
     better_errors (2.9.1)
@@ -76,7 +76,7 @@ GEM
       debug_inspector (>= 0.0.1)
     bootsnap (1.5.1)
       msgpack (~> 1.0)
-    bootstrap (4.5.3)
+    bootstrap (4.6.0)
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 1.14.3, < 2)
       sassc-rails (>= 2.0.0)
@@ -117,7 +117,7 @@ GEM
       launchy
     childprocess (3.0.0)
     coderay (1.1.3)
-    concurrent-ruby (1.1.7)
+    concurrent-ruby (1.1.8)
     crack (0.4.4)
     crass (1.0.6)
     debug_inspector (1.0.0)
@@ -211,7 +211,7 @@ GEM
     listen (3.4.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    loofah (2.8.0)
+    loofah (2.9.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.2.8)
@@ -392,7 +392,7 @@ GEM
       net-ssh (>= 2.8.0)
     sshkit-interactive (0.3.0)
       sshkit (~> 1.12)
-    thor (1.0.1)
+    thor (1.1.0)
     thread_safe (0.3.6)
     tilt (2.0.10)
     ttfunk (1.6.2.1)
@@ -434,7 +434,7 @@ DEPENDENCIES
   better_errors
   binding_of_caller
   bootsnap (>= 1.1.0)
-  bootstrap (~> 4.5.3)
+  bootstrap (~> 4.6.0)
   bugsnag
   byebug
   capistrano-bundler