linux_xanmod: 6.6.18 -> 6.6.19

  # NOTE: When updating these, please also take a look at the changes done to

  # kernel config in the xanmod version commit

  ltsVariant = {

    version = "6.6.18";

    hash = "sha256-WGfbCmM0fpWXQt1ThfaHn4bqZz22bNkhc9I2qeXMsws=";

    version = "6.6.19";

    hash = "sha256-DfoClySWV0vlDDRAJsujGj5ypnGr+HsVbszCYfi+2V0=";

    variant = "lts";

  };