Bump bootstrap from 4.5.2 to 4.5.3

Bumps [bootstrap](https://github.com/twbs/bootstrap-rubygem) from 4.5.2 to 4.5.3.
- [Release notes](https://github.com/twbs/bootstrap-rubygem/releases)
- [Changelog](https://github.com/twbs/bootstrap-rubygem/blob/master/CHANGELOG.md)
- [Commits](https://github.com/twbs/bootstrap-rubygem/compare/v4.5.2...v4.5.3)

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

Gemfile.lock

@@ -58,13 +58,13 @@ GEM
       zeitwerk (~> 2.2, >= 2.2.2)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    autoprefixer-rails (9.8.6.1)
+    autoprefixer-rails (10.0.2.0)
       execjs
     bcrypt (3.1.16)
     bindex (0.8.1)
     bootsnap (1.5.1)
       msgpack (~> 1.0)
-    bootstrap (4.5.2)
+    bootstrap (4.5.3)
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 1.14.3, < 2)
       sassc-rails (>= 2.0.0)
@@ -220,7 +220,7 @@ GEM
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.7)
+    tzinfo (1.2.8)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
@@ -248,7 +248,7 @@ PLATFORMS
 
 DEPENDENCIES
   bootsnap
-  bootstrap (~> 4.5.2)
+  bootstrap (~> 4.5.3)
   bootstrap_form (~> 4.5)
   codacy-coverage
   coffee-rails (~> 5.0.0)