DISTMYSQL-544 - [DOCS] - fix links 8.4 (#228)

modified:   docs/install-pdps.md
	modified:   docs/install-pdpxc.md
	modified:   docs/installing.md
	modified:   docs/minor-upgrade.md

Author: patrickbirch

docs/install-pdps.md

@@ -12,7 +12,7 @@ To install Percona software, you need to configure the required repository. To s
     $ sudo apt install gnupg2 curl
     ```
 
-2. [Install percona-release](https://www.percona.com/doc/percona-repo-config/installing.html). If you have it installed, [update percona-release](https://www.percona.com/doc/percona-repo-config/updating.html) to the latest version.
+2. [Install percona-release](https://docs.percona.com/percona-software-repositories/installing.html). If you have `percona-release` installed, [update percona-release](https://docs.percona.com/percona-software-repositories/updating.html) to the latest version.
 
 ## Procedure
 

docs/install-pdpxc.md

@@ -12,7 +12,7 @@ To install Percona software, you need to configure the required repository. To s
     $ sudo apt install gnupg2 curl
     ```
 
-2. [Install percona-release](https://www.percona.com/doc/percona-repo-config/installing.html). If you have it installed, [update percona-release](https://www.percona.com/doc/percona-repo-config/updating.html) to the latest version.
+2. [Install percona-release](https://docs.percona.com/percona-software-repositories/installing.html). If you have `percona-release` installed, [update percona-release](https://docs.percona.com/percona-software-repositories/updating.html) to the latest version.
 
 ## Procedure
 

docs/installing.md

@@ -6,8 +6,8 @@
 
 We recommend to install Percona Distribution for MySQL from Percona repositories using the package manager of your operating system:
 
-* `apt` - for Debian and Ubuntu Linux
-* `yum` - for Red Hat Enterprise Linux and compatible Linux derivatives
+* `APT` - for Debian and Ubuntu Linux
+* `YUM` or `DNF` - for Red Hat Enterprise Linux and compatible Linux derivatives
 
 Find the full list of supported platforms on the [Percona Software and Platform Lifecycle](https://www.percona.com/services/policies/percona-software-support-lifecycle#mysql) page.
 

docs/minor-upgrade.md

@@ -12,7 +12,7 @@ Though minor releases don’t change the behavior, even a minor upgrade is a ris
 
 ## Preconditions
 
-To upgrade Percona Distribution for MySQL, [install the `percona-release` repository management tool](https://www.percona.com/doc/percona-repo-config/installing.html) or [update it](https://www.percona.com/doc/percona-repo-config/updating.html) to the latest version.
+To upgrade Percona Distribution for MySQL, [install the `percona-release` repository management tool](https://docs.percona.com/percona-software-repositories/installing.html) or [update the `percona-release` tool](https://docs.percona.com/percona-software-repositories/updating.html) to the latest version.
 
 ## Procedure