Updates release date for v.1.2.0

Author: LordHepipud

doc/30-Upgrading-Plugins.md

@@ -4,6 +4,10 @@ Upgrading Icinga PowerShell Plugins is usually quite straightforward.
 
 Specific version upgrades are described below. Please note that version updates are incremental.
 
+## Upgrading to v1.2.0 (2020-08-28)
+
+*No special steps required*
+
 ## Upgrading to v1.1.0 (2020-06-02)
 
 ### Icinga PowerShell Framework dependency

doc/31-Changelog.md

@@ -7,7 +7,7 @@ documentation before upgrading to a new release.
 
 Released closed milestones can be found on [GitHub](https://github.com/Icinga/icinga-powershell-plugins/milestones?state=closed).
 
-## 1.2.0 (pending)
+## 1.2.0 (2020-08-28)
 
 [Issue and PRs](https://github.com/Icinga/icinga-powershell-plugins/milestone/3?closed=1)