docs: update readme project status for Q2 2021 (#22598)

Fixes #22589

(cherry picked from commit 2aa9d2b)

Author: jelbourn

README.md

@@ -33,7 +33,7 @@ If you'd like to contribute, please follow our [contributing guidelines][contrib
 our [`help wanted`][help-wanted] label for a list of issues with good opportunities for
 contribution.
 
-## What we're working on now (Q1 2021):
+## What we're working on now (Q2 2021):
 * Continuing to create new, API-compatible versions of the Angular Material components backed by
 [MDC Web][] ([see @jelbourn's ng-conf talk](https://youtu.be/4EXQKP-Sihw?t=891)). Much of our effort
 is dedicated towards rolling out these new versions of the components across Angular apps
@@ -45,7 +45,8 @@ inside Google. This work will payoff with the following benefits:
   * Increase number of people working to continuously improve the components on an on-going basis
     (both the Angular team and the Material Design team).
 * Continue work on virtual-scroll support for cdk/table.
-* Switching to new Sass module system (`@use`)
+* Accessibility - we'll be doing a major pass on outstanding accessibility issues and reviewing all
+of the components for accessibility best practices such as WCAG.
 
 
 ## About the team