PXB-3193 Add innovation release explanation (8.1)

	modified:   docs/index.md
	modified:   docs/release-notes/8.1.0-1.md

docs/index.md

@@ -1,9 +1,10 @@
 
-# Percona XtraBackup {{vers}} - Documentation
+# Percona XtraBackup {{vers}} Documentation
 
 !!! note ""
 
     This documentation is for the latest release: Percona XtraBackup {{vers}} ([Release Notes](release-notes/{{release}}.md)).
+    This is an Innovation release. This type of release is only supported for a short time and is designed to be used in an environment with fast upgrade cycles. Developers and DBAs are exposed to the latest features and improvements.
 
 Percona XtraBackup is an open source hot backup utility for
 MySQL-based servers that keep your database fully available during planned maintenance windows.
@@ -13,6 +14,8 @@ Percona XtraBackup is designed to make backups seamless
 without disrupting the server's performance in a production
 environment. Percona XtraBackup (PXB) is a 100% open source backup solution with [commercial support](https://www.percona.com/mysql-support/) available for organizations who want to benefit from comprehensive, responsive, and cost-flexible database support for MySQL.
 
+This is an Innovation release. This type of release is only supported for a short time and is designed to be used in an environment with fast upgrade cycles. Developers and DBAs are exposed to the latest features and improvements.
+
 ## Supported storage engines
 
 Percona XtraBackup can back up data from InnoDB, XtraDB,

docs/release-notes/8.1.0-1.md

@@ -4,6 +4,8 @@ Get started with [Quickstart Guide for Percona XtraBackup](..//quickstart-overvi
 
 [Percona XtraBackup (PXB)](https://www.percona.com/software/mysql-database/percona-xtrabackup) is a 100% open source backup solution for all versions of Percona Server for MySQL and MySQL® that performs online non-blocking, tightly compressed, highly secure full backups on transactional systems. Maintain fully available applications during planned maintenance windows with Percona XtraBackup.
 
+This is an Innovation release. This type of release is only supported for a short time and is designed to be used in an environment with fast upgrade cycles. Developers and DBAs are exposed to the latest features and improvements.
+
 ## Release highlights
 
 Percona XtraBackup 8.1.0-1 is based on MySQL 8.1 and fully supports the Percona Server for MySQL 8.1 Innovation series and the MySQL 8.1 Innovation series. This release allows taking backups of Percona Server 8.1.0-1 and MySQL 8.1.