fix comment: 'when need' -> 'when you need'

Signed-off-by: Ilya Kiselev <kis-ilya-a@yandex.ru>

pkg/engine/funcs.go

@@ -167,7 +167,7 @@ func toTOML(v any) string {
 // mustToTOML takes an interface, marshals it to toml, and returns a string.
 // It will panic if there is an error.
 //
-// This is designed to be called from a template when need to ensure that the
+// This is designed to be called from a template when you need to ensure that the
 // output TOML is valid.
 func mustToTOML(v any) string {
 	b := bytes.NewBuffer(nil)