Fix grammatical error in release notes introduction

Author: ImadSaddik

release-notes/intro/index.md

@@ -12,7 +12,7 @@ navigation_title: Release notes
 
 Stay up to date with the latest changes, fixes, known issues, and deprecations in Elastic products. 
 
-Release notes cover the all the latest Elastic product changes, including the following:
+Release notes cover all the latest Elastic product changes, including the following:
 * {{stack}} {{version.stack.base}} and later, including the most recent {{version.stack}} release
 * {{serverless-full}}, including updates to {{es}}, and {{observability}} and {{elastic-sec}} solutions