Bump bootstrap from 5.1.3 to 5.3.1

Bumps [bootstrap](https://github.com/twbs/bootstrap-rubygem) from 5.1.3 to 5.3.1.
- [Release notes](https://github.com/twbs/bootstrap-rubygem/releases)
- [Changelog](https://github.com/twbs/bootstrap-rubygem/blob/main/CHANGELOG.md)
- [Commits](twbs/bootstrap-rubygem@v5.1.3...v5.3.1)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -57,7 +57,7 @@ end
 
 gem 'activerecord-postgis-adapter'
 gem 'active_storage_validations'
-gem 'bootstrap', '~> 5.1.3' # CSS variable usage in v5.2.x is incomplete until Bootstrap 6
+gem 'bootstrap', '~> 5.3.1' # CSS variable usage in v5.2.x is incomplete until Bootstrap 6
 gem 'bootstrap-datepicker-rails'
 gem 'coffee-rails'
 gem 'exception_notification'

Gemfile.lock

@@ -99,9 +99,9 @@ GEM
     bindex (0.8.1)
     bootsnap (1.16.0)
       msgpack (~> 1.2)
-    bootstrap (5.1.3)
+    bootstrap (5.3.1)
       autoprefixer-rails (>= 9.1.0)
-      popper_js (>= 2.9.3, < 3)
+      popper_js (>= 2.11.8, < 3)
       sassc-rails (>= 2.0.0)
     bootstrap-datepicker-rails (1.10.0.1)
       railties (>= 3.0)
@@ -345,7 +345,7 @@ GEM
       sprockets (>= 3.0.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
-    thor (1.2.2)
+    thor (1.3.0)
     tilt (2.3.0)
     timeout (0.4.0)
     turbolinks (5.2.1)
@@ -380,7 +380,7 @@ DEPENDENCIES
   activerecord-postgis-adapter
   bcrypt (~> 3.1.7)
   bootsnap (>= 1.4.2)
-  bootstrap (~> 5.1.3)
+  bootstrap (~> 5.3.1)
   bootstrap-datepicker-rails
   brakeman
   bullet