Upgrade kind to v0.20.0 (#598)

diff --git a/Makefile b/Makefile
index 628f19d..0cf8ad7 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,7 @@
 CONTROLLER_GEN_VERSION=v0.10.0
 GO_LICENSES_VERSION=v1.6.0
 GINKGO_VERSION = $(shell cat go.mod | grep 'github.com/onsi/ginkgo' | sed 's/.*\(v.*\)$$/\1/g')
-KIND_VERSION=v0.17.0
+KIND_VERSION=v0.20.0
 YQ_VERSION=v4.33.3
 # ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
 ENVTEST_K8S_VERSION ?= 1.25.0
diff --git a/hack/release/smoke_test/test_cluster.sh b/hack/release/smoke_test/test_cluster.sh
index 26e9c3a..498cb96 100755
--- a/hack/release/smoke_test/test_cluster.sh
+++ b/hack/release/smoke_test/test_cluster.sh
@@ -115,7 +115,7 @@
 
 if ! (which kind); then
   echo "Install Kind (Kubernetes in Docker)"
-  GO111MODULE="on" go install sigs.k8s.io/kind@v0.11.1
+  GO111MODULE="on" go install sigs.k8s.io/kind@v0.20.0
 fi
 
 CLUSTER_NAME="solr-operator-${VERSION}-rc"