Prepare to publish angular_components: 0.9.0-alpha+8

Final updates to CHANGELOG and README.

PiperOrigin-RevId: 189764540

Author: nshahan

CHANGELOG.md

@@ -8,7 +8,7 @@
  * Add ShowHideDirective and GlobalEscapeDirective.
  * Material Button: Update highlight styling.
  * Material Chips: Allow overriding left-icon-color.
- * Material Expansionpanel:
+ * Material ExpansionPanel:
    * Allow icon to be hidden and allow additional buttons in the header.
    * Increase mixin specificity.
  * Material Input:
@@ -22,8 +22,8 @@
    * Add mixin to allow for error text margin.
    * Refactor `constructEncapsulatedCss` to utils.
  * Material Tab: Make `text-wrap` mixin more generic.
- * Material Tree: Add a 'shouldExpandAllWhenFiltered' input.
- * Material Toggle: Fix aria-pressed state.
+ * Material Tree: Add a `shouldExpandAllWhenFiltered` input.
+ * Material Toggle: Fix `aria-pressed` state.
  * Material Tooltip:
    * Allow paper tooltip CSS to be customizable.
    * Allow `'error_outline'` as a valid icon.

README.md

@@ -14,9 +14,9 @@ Angular package.
 This is a continually growing set of widgets. See the [example gallery] and the
 [documentation] for a full list. Recent additions include:
 
+* Material Datepicker
 * Material Menu
 * Material Auto-suggest Input
-* Material Select Searchbox
 
 [example gallery]: https://dart-lang.github.io/angular_components_example/
 [documentation]: https://www.dartdocs.org/documentation/angular_components/latest/angular_components/angular_components-library.html
@@ -75,7 +75,7 @@ code generation through package [build]. To build your project with
 ## Required Icon Font
 
 For icons to appear, add the following icon font download to your page.
-[Example](https://github.com/dart-lang/angular_components_example/blob/master/web/index.html#L13)
+[Example](https://github.com/dart-lang/angular_components_example/blob/ae323a593cbb5508fa6fbe33afb7f5d40ea96a7e/angular_gallery/lib/builder/template/index.html.mustache#L8)
 
 ```html
 <link