Update date variables (#586)

This PR simply updates the dates of the 2.2.0 release, as it was merged prior to release branch.

Author: Andriciuc

documentation/docs/templates/pdf_cover_page.tpl

@@ -7,5 +7,5 @@
 {% if config.site_description %}
 <h1>{{ config.site_description }}</h1>
 {% endif %} 
-<h2> 2.1.1 (2026-01-22)</h2>
+<h2> 2.2.0 (2026-05-20)</h2>
 <!--<h3>Percona Technical Documentation Team</h3>-->

documentation/variables.yml

@@ -8,7 +8,7 @@ tdebranch: release-2.2.0
 
 date:
 
-  2_2_0: '2026-05-18'
+  2_2_0: '2026-05-20'
   2_1_2: '2026-03-02'
   2_1_1: '2026-01-22'
   2_1: '2025-11-28'