Fix broken links in README.md

Copy proper changes from https://github.com/percona/pxc-docs

README.md

@@ -3,20 +3,19 @@
 ![PXC logo](doc/source/percona-xtradb-cluster-logo.jpg)
 
 
-For more information about the Percona XtraDB Cluster components and how to use this product, see [Percona XtraDB Cluster documentation](https://www.percona.com/doc/percona-xtradb-cluster)
+For more information about the Percona XtraDB Cluster components and how to use this product, see [Percona XtraDB Cluster documentation](https://docs.percona.com/percona-xtradb-cluster/)
 
 ## Installation
 
 You can install Percona XtraDB Cluster using the following methods:
 - from the Percona repository 
 - Build from the [source code](https://github.com/percona/percona-xtradb-cluster)
 
-The installation instructions in the official documentation are [here](https://www.percona.com/doc/percona-xtradb-cluster/LATEST/install/index.html).
+You can find the installation instructions in the [official documentation](https://docs.percona.com/percona-xtradb-cluster/latest/install/index.html).
 
 ## Release Notes
 
-
-The Release Notes are located [here](https://www.percona.com/doc/percona-xtradb-cluster/LATEST/release-notes/release-notes_index.html)
+The Release Notes are located [here](https://docs.percona.com/percona-xtradb-cluster/latest/release-notes/release-notes_index.html)
 
 The Release Announcements are available [here](https://forums.percona.com/c/percona-news/software-new-releases/)
 
@@ -37,9 +36,9 @@ Percona is dedicated to **keeping open source open**. Whenever possible, we stri
 
 ## How to get involved
 
-We encourage contributions and are always looking for new members that are as dedicated to serving the community as we are. The [Contributing Guide](https://github.com/percona/percona-xtradb-cluster/blob/8.0/doc/source/contributing.md) contains how you can contribute.
+We encourage contributions and are always looking for new members that are as dedicated to serving the community as we are. The [Contributing Guide](https://github.com/percona/pxc-docs/blob/8.0/contributing.md) contains instructions on how you can contribute.
 
 ## Contact
 You can reach us by using the [Forum](https://forums.percona.com/c/mysql-mariadb/percona-xtradb-cluster-8-x/)
 
-Copyright (c) 2000, 2021, Oracle and/or its affiliates.
+Copyright (c) 2000, 2022, Oracle and/or its affiliates.