Bump bootstrap from 4.6.2 to 4.6.2.1 (#343)

Bumps [bootstrap](https://github.com/twbs/bootstrap-rubygem) from 4.6.2 to 4.6.2.1.
- [Release notes](https://github.com/twbs/bootstrap-rubygem/releases)
- [Changelog](https://github.com/twbs/bootstrap-rubygem/blob/v4.6.2.1/CHANGELOG.md)
- [Commits](twbs/bootstrap-rubygem@v4.6.2...v4.6.2.1)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
...

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

Gemfile.lock

@@ -82,10 +82,9 @@ GEM
       execjs (~> 2)
     base64 (0.2.0)
     bigdecimal (3.1.8)
-    bootstrap (4.6.2)
+    bootstrap (4.6.2.1)
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 1.16.1, < 2)
-      sassc-rails (>= 2.0.0)
     bootstrap-datepicker-rails (1.10.0.1)
       railties (>= 3.0)
     brakeman (5.4.1)
@@ -115,7 +114,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.3.3)
+    concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     crass (1.0.6)
     database_cleaner (2.0.2)
@@ -212,7 +211,7 @@ GEM
     method_source (1.1.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
-    minitest (5.24.1)
+    minitest (5.25.1)
     multipart-post (2.4.1)
     mutex_m (0.2.0)
     net-http (0.4.1)
@@ -295,7 +294,7 @@ GEM
     rdoc (6.7.0)
       psych (>= 4.0.0)
     regexp_parser (2.9.2)
-    reline (0.5.9)
+    reline (0.5.10)
       io-console (~> 0.5)
     rexml (3.3.6)
       strscan
@@ -383,7 +382,7 @@ GEM
     stringio (3.1.1)
     strscan (3.1.0)
     temple (0.10.3)
-    thor (1.3.1)
+    thor (1.3.2)
     tilt (2.4.0)
     timeout (0.4.1)
     turbolinks (5.2.1)
@@ -410,7 +409,7 @@ GEM
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.6.17)
+    zeitwerk (2.6.18)
 
 PLATFORMS
   aarch64-linux