Made some change in Announcement.

windows/release-information/windows-message-center.yml

@@ -53,7 +53,7 @@ sections:
       <tr><td><a href = 'https://techcommunity.microsoft.com/t5/Windows-IT-Pro-Blog/Windows-10-update-servicing-cadence/ba-p/222376' target='_blank'><b>Reminder: Windows 10  update servicing cadence</b></a><br><div>This month we received questions about the cadence of updates we released in April and May 2019. Here's a quick recap of our releases and servicing cadence: <br>
  <ul>
 <li>	April 9, 2019 was the regular Update Tuesday release for all versions of Windows.</li> 
-<li>	May 1, 2019 was an \"optional\" out of band update (OOB), non-security update for Windows 10, version 1809. It was released to Microsoft Catalog and WSUS, providing a critical fix for our OEM partners. </li>
+<li>	May 1, 2019 was an \"optional,\" out of band non-security update (OOB) for Windows 10, version 1809. It was released to Microsoft Catalog and WSUS, providing a critical fix for our OEM partners. </li>
 <li>	May 3, 2019 was the \"optional\" Windows 10, version 1809 \"C\" release for April. This update contained important <a href='https://support.microsoft.com/help/4470918/updates-for-may-2019-japan-era-change' target='_blank'>Japanese era</a> packages for commercial customers to preview. It was released later than expected and mistakenly targeted as \"required\" (instead of \"optional\") for consumers, which pushed the update out to customers and required a reboot. Within 24 hours of receiving customer reports, we corrected the targeting logic and mitigated the issue.</li>
  </ul>
  For more information about the Windows 10  update servicing cadence, please see the <a href='https://techcommunity.microsoft.com/t5/Windows-IT-Pro-Blog/Windows-10-update-servicing-cadence/ba-p/222376' target='_blank'>Window IT Pro blog</a>.</div></td><td>May 10, 2019 <br>10:00 AM PT</td></tr>