Pull request: all: upd golang-ubuntu image version

Merge in DNS/adguard-home from upd-golang-ubuntu to master

Squashed commit of the following:

commit 67874bad7e018d6d17dc4f000aef79a5a430b994
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Mon Oct 11 15:32:39 2021 +0300

    all: upd golang-ubuntu image version

bamboo-specs/release.yaml

@@ -7,7 +7,7 @@
 # Make sure to sync any changes with the branch overrides below.
 'variables':
   'channel': 'edge'
-  'dockerGo': 'adguard/golang-ubuntu:3.3'
+  'dockerGo': 'adguard/golang-ubuntu:3.6'
 
 'stages':
 - 'Make release':
@@ -266,7 +266,7 @@
     # need to build a few of these.
     'variables':
       'channel': 'beta'
-      'dockerGo': 'adguard/golang-ubuntu:3.3'
+      'dockerGo': 'adguard/golang-ubuntu:3.6'
 # release-vX.Y.Z branches are the branches from which the actual final release
 # is built.
 - '^release-v[0-9]+\.[0-9]+\.[0-9]+':
@@ -276,4 +276,4 @@
     # are the ones that actually get released.
     'variables':
       'channel': 'release'
-      'dockerGo': 'adguard/golang-ubuntu:3.3'
+      'dockerGo': 'adguard/golang-ubuntu:3.6'

bamboo-specs/test.yaml

@@ -5,7 +5,7 @@
   'key': 'AHBRTSPECS'
   'name': 'AdGuard Home - Build and run tests'
 'variables':
-  'dockerGo': 'adguard/golang-ubuntu:3.3'
+  'dockerGo': 'adguard/golang-ubuntu:3.6'
 
 'stages':
 - 'Tests':