Update internal/fnruntime/celeval.go

Co-authored-by: Gergely Nagy <nagy.gergely14@gmail.com>

Author: SurbhiAgarwal1

internal/fnruntime/celeval.go

@@ -20,6 +20,9 @@ import (
 
 	"github.com/google/cel-go/cel"
 	"github.com/google/cel-go/common/types"
+	"github.com/google/cel-go/ext"
+	"k8s.io/apiserver/pkg/cel/library"
+	k8scellib "k8s.io/apiserver/pkg/cel/library"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 )