util: clarify usage context of ReplaceRegexInFile

Update the comment to note that the function is currently unused in the Kubebuilder codebase, but used by other projects and may be used internally in the future.

Author: kersten

pkg/plugin/util/util.go

@@ -245,6 +245,9 @@ func ReplaceInFile(path, oldValue, newValue string) error {
 
 // ReplaceRegexInFile finds all strings that match `match` and replaces them
 // with `replace` in the file at path.
+//
+// This function is currently unused in the Kubebuilder codebase,
+// but is used by other projects and may be used in Kubebuilder in the future.
 func ReplaceRegexInFile(path, match, replace string) error {
 	matcher, err := regexp.Compile(match)
 	if err != nil {