Bump bootstrap from 5.3.0 to 5.3.1

Bumps bootstrap from 5.3.0 to 5.3.1.

Release notes

Sourced from bootstrap's releases.

v5.3.1

Highlights

• Color modes:
  • Increased color contrast for dark mode by replacing $gray-500 with $gray-300 for the body color
  • Added our color mode switcher JavaScript to our examples ZIP download
• Components:
  • Improved disabled styling for all .nav-links, providing .disabled and :disabled for use with anchors and buttons
  • Add support for Home and End keys for navigating tabs by keyboard
  • Added some basic styling to toggle buttons when no modifier class is present
  • Fixed carousel colors in dark mode
• Forms:
  • Fixed floating label disabled text color
• Utilities:
  • .text-bg-* utilities now use CSS variables
• Sass:
  • Add new $navbar-dark-icon-color Sass variable
  • Removed duplicate $alert Sass variables
  • Added a new variable for $vr-border-width to customize the vertical rule helper width
• Documentation:
  • Added search to our homepage
  • Improved responsive behavior on Dashboard example
  • Improved dark mode rendering of Cheatsheet examples

---

🎨 CSS

• #38913: Floating labels: fix disabled with text inside
• #38772: .text-bg-* helpers now use theme CSS variables
• #38886: New Sass variable to change vertical rule width
• #38851: Fix Sass properties order for newer stylelint-config-recess-order
• #38815: Increase contrast in dark-mode (#38525)
• #38774: Generalize disabled nav links CSS rules
• #38673: Add $navbar-dark-icon-color
• #38674: Remove duplicate $alert-*-scale Sass vars

☕️ JavaScript

• #38498: Support Home and End keys in tabs

📖 Docs

• #38958: Examples: improve spinner buttons accessibility
• #38947: Fix postcss plugin options
• #38885: Docs: Update float responsive examples
• #38946: Docs: remove v4 reference on homepage
• #38948: Fix some typos in Customize > Sass doc
• #38840: Docs: fix carousel carousel colors of carousel examples in dark mode
• #38604: Add dropdown alignment options to button group example

... (truncated)

Commits

• 2a1bf52 Release v5.3.1 (#38956)
• 8e5dada Examples: improve spinner buttons accessibility (#38958)
• 11b3806 Fix bundlewatch values (#38954)
• 57ddb42 Fix postcss plugin options (#38947)
• cc5a8a9 fix
• ea21de1 Docs: Update float responsive examples
• 92d779f Update devDependencies and regenerate package-lock.json
• 01dacaf dashboard: fix offcanvas md display (#38952)
• 4271d22 Docs: remove v4 reference in homepage
• 1c80bd9 Fix some typos in Customize > Sass doc (#38948)
• Additional commits viewable in compare view