Add all releases from 2.12 branch to changelog

debian/changelog

@@ -4,12 +4,54 @@ icinga2 (2.13.0-1) icinga; urgency=medium
 
  -- Alexander Klimov <alexander.klimov@icinga.com>  Tue, 03 Aug 2021 09:44:31 +0200
 
+icinga2 (2.12.5-1) icinga; urgency=medium
+
+  * Release 2.12.5-1
+
+ -- Julian Brost <julian.brost@icinga.com>  Wed, 14 Jul 2021 14:56:14 +0200
+
+icinga2 (2.12.4-1) icinga; urgency=medium
+
+  * Release 2.12.4-1
+
+ -- Julian Brost <julian.brost@icinga.com>  Thu, 27 May 2021 10:47:13 +0200
+
+icinga2 (2.12.3-1) icinga; urgency=medium
+
+  * Release 2.12.3-1
+
+ -- Noah Hilverling <noah.hilverling@icinga.com>  Tue, 15 Dec 2020 12:15:50 +0200
+
+icinga2 (2.12.2-1) icinga; urgency=medium
+
+  * Release 2.12.2-1
+
+ -- Julian Brost <julian.brost@icinga.com>  Mon, 23 Nov 2020 14:15:37 +0100
+
+icinga2 (2.12.1-1) icinga; urgency=medium
+
+  * Release 2.12.1-1
+
+ -- Alexander A. Klimov <alexander.klimov@icinga.com>  Tue, 13 Oct 2020 18:22:22 +0200
+
+icinga2 (2.12.0-1) icinga; urgency=medium
+
+  * Release 2.12.0-1
+
+ -- Henrik Triem <henrik.triem@icinga.com>  Wed, 05 Aug 2020 10:01:22 +0200
+
 icinga2 (2.11.4-1) icinga; urgency=medium
 
   * Release 2.11.4-1
 
  -- Noah Hilverling <noah.hilverling@icinga.com>  Thu, 18 Jun 2020 09:44:31 +0200
 
+icinga2 (2.12.0~rc1-1) icinga; urgency=medium
+
+  * Prepare pre-release for 2.12
+
+ -- Johannes Meyer <johannes.meyer@icinga.com>  Fri, 13 Mar 2020 14:27:38 +0200
+
 icinga2 (2.11.3-1) icinga; urgency=medium
 
   * Release 2.11.3-1