add CHANGELOG and change import order

Signed-off-by: Shane <[email protected]>

Author: ctccxxd

CHANGELOG.md

@@ -58,7 +58,7 @@ To learn more about active deprecations, we recommend checking [GitHub Discussio
 
 ### New
 
-- TODO ([#XXX](https://github.com/kedacore/keda/issues/XXX))
+-**General**: Add scaleTargetRef exists check in webhook and revise some variable name ([#6350](https://github.com/kedacore/keda/pull/6350))
 
 #### Experimental
 

apis/keda/v1alpha1/scaledobject_types.go

@@ -19,11 +19,12 @@ package v1alpha1
 import (
 	"context"
 	"fmt"
+	"reflect"
+	"strconv"
+
 	"github.com/kedacore/keda/v2/pkg/common/message"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
-	"reflect"
 	"sigs.k8s.io/controller-runtime/pkg/client"
-	"strconv"
 
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"