Merge pull request #456 from watson-developer-cloud/mediumTaj-patch-2

Update README.md

Author: mediumTaj

README.md

@@ -25,7 +25,7 @@ The .NET Standard SDK uses [Watson][wdc] services, a collection of REST APIs tha
 * [License](#license)
 * [Contributing](#contributing)
 
-## ANNOUNCEMENTS!
+## Announcements
 ### Updating endpoint URLs from watsonplatform.net
 Watson API endpoint URLs at watsonplatform.net are changing and will not work after 26 May 2021. Update your calls to use the newer endpoint URLs. For more information, see https://cloud.ibm.com/docs/watson?topic=watson-endpoint-change.