Release v4.3.0 (#28228)v4.3.0

* Prep for v4.3.0

* More updates for v4.3.0.

* rerun to build docs source map

2 files changed, 54 insertions, 0 deletions

diff --git a/site/docs/4.3/examples/starter-template/index.html b/site/docs/4.3/examples/starter-template/index.html
new file mode 100644
index 0000000000..d90f50b85f
--- /dev/null
+++ b/site/docs/4.3/examples/starter-template/index.html
@@ -0,0 +1,47 @@
+---
+layout: examples
+title: Starter Template
+extra_css: "starter-template.css"
+---
+
+<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
+  <a class="navbar-brand" href="#">Navbar</a>
+  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
+    <span class="navbar-toggler-icon"></span>
+  </button>
+
+  <div class="collapse navbar-collapse" id="navbarsExampleDefault">
+    <ul class="navbar-nav mr-auto">
+      <li class="nav-item active">
+        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
+      </li>
+      <li class="nav-item">
+        <a class="nav-link" href="#">Link</a>
+      </li>
+      <li class="nav-item">
+        <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
+      </li>
+      <li class="nav-item dropdown">
+        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
+        <div class="dropdown-menu" aria-labelledby="dropdown01">
+          <a class="dropdown-item" href="#">Action</a>
+          <a class="dropdown-item" href="#">Another action</a>
+          <a class="dropdown-item" href="#">Something else here</a>
+        </div>
+      </li>
+    </ul>
+    <form class="form-inline my-2 my-lg-0">
+      <input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
+      <button class="btn btn-secondary my-2 my-sm-0" type="submit">Search</button>
+    </form>
+  </div>
+</nav>
+
+<main role="main" class="container">
+
+  <div class="starter-template">
+    <h1>Bootstrap starter template</h1>
+    <p class="lead">Use this document as a way to quickly start any new project.<br> All you get is this text and a mostly barebones HTML document.</p>
+  </div>
+
+</main><!-- /.container -->
diff --git a/site/docs/4.3/examples/starter-template/starter-template.css b/site/docs/4.3/examples/starter-template/starter-template.css
new file mode 100644
index 0000000000..5f64cd294e
--- /dev/null
+++ b/site/docs/4.3/examples/starter-template/starter-template.css
@@ -0,0 +1,7 @@
+body {
+  padding-top: 5rem;
+}
+.starter-template {
+  padding: 3rem 1.5rem;
+  text-align: center;
+}