Quote the channel annotations to be treated as strings

Makefile

@@ -272,6 +272,7 @@ bundle: operator-sdk manifests kustomize ## Generate bundle manifests and metada
 	sed -i 's/mediatype: \"\"/mediatype: \"image\/svg+xml\"/g' bundle/manifests/gatekeeper-operator.clusterserviceversion.yaml
 	sed -i 's/^  version:.*/  version: $(VERSION)/' bundle/manifests/gatekeeper-operator.clusterserviceversion.yaml
 	sed -i '/^    createdAt:.*/d' bundle/manifests/gatekeeper-operator.clusterserviceversion.yaml
+	sed -i 's/$(CHANNELS)/"$(CHANNELS)"/g' bundle/metadata/annotations.yaml
 ifneq ($(REPLACES_VERSION), none)
 	sed -i 's/^  replaces:.*/  replaces: gatekeeper-operator.v$(REPLACES_VERSION)/' bundle/manifests/gatekeeper-operator.clusterserviceversion.yaml
 else

bundle/metadata/annotations.yaml

@@ -4,8 +4,8 @@ annotations:
   operators.operatorframework.io.bundle.manifests.v1: manifests/
   operators.operatorframework.io.bundle.metadata.v1: metadata/
   operators.operatorframework.io.bundle.package.v1: gatekeeper-operator
-  operators.operatorframework.io.bundle.channels.v1: 3.11
-  operators.operatorframework.io.bundle.channel.default.v1: 3.11
+  operators.operatorframework.io.bundle.channels.v1: "3.11"
+  operators.operatorframework.io.bundle.channel.default.v1: "3.11"
   operators.operatorframework.io.metrics.builder: operator-sdk-v1.28.1
   operators.operatorframework.io.metrics.mediatype.v1: metrics+v1
   operators.operatorframework.io.metrics.project_layout: go.kubebuilder.io/v3