Bump bootstrap from 4.6.2 to 4.6.2.1

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] <[email protected]>

Gemfile.lock

@@ -172,10 +172,9 @@ GEM
       underscore-rails (~> 1.6)
     bootsnap (1.18.3)
       msgpack (~> 1.2)
-    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_form (4.5.0)
       actionpack (>= 5.2)
       activemodel (>= 5.2)
@@ -610,9 +609,9 @@ GEM
       babel-source (>= 5.8.11)
       babel-transpiler
       sprockets (>= 3.0.0)
-    sprockets-rails (3.4.2)
-      actionpack (>= 5.2)
-      activesupport (>= 5.2)
+    sprockets-rails (3.5.2)
+      actionpack (>= 6.1)
+      activesupport (>= 6.1)
       sprockets (>= 3.0.0)
     sqlite3 (1.7.2-aarch64-linux)
     sqlite3 (1.7.2-arm64-darwin)