Bump go to 1.20.6

Author: nikita-vanyasin

.travis.yml

@@ -9,7 +9,7 @@ go:
   - "1.20.x"
 
 env:
-  - VERBOSE=1 MULTIARCH=0 GOIMAGE=gcr.io/gcr-for-testing/golang:1.20.3 ALPINE_IMAGE=gcr.io/gcr-for-testing/alpine:3.17 ARANGODB=gcr.io/gcr-for-testing/arangodb/arangodb:3.9.2 STARTER_MODES="single,cluster,activefailover"
+  - VERBOSE=1 MULTIARCH=0 GOIMAGE=gcr.io/gcr-for-testing/cici/golang:1.20.6-linux-amd64 ALPINE_IMAGE=gcr.io/gcr-for-testing/alpine:3.17 ARANGODB=gcr.io/gcr-for-testing/arangodb/arangodb:3.9.2 STARTER_MODES="single,cluster,activefailover"
 
 install:
   - make init

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Fix context handling in WaitUntilStarterReady for tests
 - Show error when user tries to change value of "persistent" option
 - Proper leader election and cluster upgrade without using observe and TTL features
+- Update go to 1.20.6
 
 ## [0.15.8](https://github.com/arangodb-helper/arangodb/tree/0.15.8) (2023-06-02)
 - Add passing ARANGODB_SERVER_DIR env variable when starting arangod instances

Makefile

@@ -35,7 +35,7 @@ REPODIR := $(ORGDIR)/$(REPONAME)
 REPOPATH := $(ORGPATH)/$(REPONAME)
 
 GOPATH := $(GOBUILDDIR)
-GOVERSION := 1.20.3
+GOVERSION := 1.20.6
 GOIMAGE ?= golang:$(GOVERSION)-alpine3.17
 
 GOOS ?= linux