Updates the Material 3 dev-docs

Updates to the developer docs to include links and images.

Bug: 228946904
Relnote: N/A
Test: N/A
Change-Id: Icd3eb1e226ff879b017791db4d7b58913203b1a7

diff --git a/compose/material3/material3/src/commonMain/kotlin/androidx/compose/material3/NavigationBar.kt b/compose/material3/material3/src/commonMain/kotlin/androidx/compose/material3/NavigationBar.kt
index 4e541d3..e85a0c3 100644
--- a/compose/material3/material3/src/commonMain/kotlin/androidx/compose/material3/NavigationBar.kt
+++ b/compose/material3/material3/src/commonMain/kotlin/androidx/compose/material3/NavigationBar.kt

@@ -56,12 +56,13 @@
 import kotlin.math.roundToInt
 
 /**
+ * <a href="https://m3.material.io/components/navigation-bar/overview" class="external" target="_blank">Material Design bottom navigation bar</a>.
+ *
+ * Navigation bars offer a persistent and convenient way to switch between primary destinations in
+ * an app.
+ *
  * ![Navigation bar image](https://developer.android.com/images/reference/androidx/compose/material3/navigation-bar.png)
  *
- * Material Design bottom navigation bar.
- *
- * A bottom navigation bar allows switching between primary destinations in an app.
- *
  * [NavigationBar] should contain three to five [NavigationBarItem]s, each representing a singular
  * destination.
  *
@@ -107,6 +108,9 @@
 /**
  * Material Design navigation bar item.
  *
+ * Navigation bars offer a persistent and convenient way to switch between primary destinations in
+ * an app.
+ *
  * The recommended configuration for a [NavigationBarItem] depends on how many items there are
  * inside a [NavigationBar]:
  *