fix: use yaml definition for chart import-values

requirements.go

@@ -20,7 +20,7 @@ type Dependency struct {
 	Version      string   `yaml:"version,omitempty"`
 	// ImportValues holds the mapping of source values to parent key to be imported. Each item can be a
 	// string or pair of child/parent sublist items.
-	ImportValues []interface{} `json:"import-values,omitempty"`
+	ImportValues []interface{} `yaml:"import-values,omitempty"`
 }
 
 type ChartDependency struct {