Increase default download interval and backoff

[okafke]

I am seeing more and more timeouts when downloading assets, perhaps Mojang has changed some rate limits.
Similar observations have also been observed by other users: headlesshq/mc-runtime-test#82

The default values for these properties should get increased.

headlessmc/headlessmc-launcher/src/main/java/io/github/headlesshq/headlessmc/launcher/LauncherProperties.java

Lines 62 to 70 in c99630e

	Property<Long> ASSETS_DELAY = number("hmc.assets.delay");
	Property<Long> ASSETS_RETRIES = number("hmc.assets.retries");
	Property<Boolean> ASSETS_PARALLEL = bool("hmc.assets.parallel");
	Property<Boolean> DUMMY_ASSETS = bool("hmc.assets.dummy");
	Property<Boolean> ASSETS_CHECK_HASH = bool("hmc.assets.check.hash");
	Property<Boolean> ASSETS_CHECK_SIZE = bool("hmc.assets.check.size"); // < implied by check hash
	Property<Boolean> ASSETS_CHECK_FILE_HASH = bool("hmc.assets.check.file.hash");
	Property<Boolean> ASSETS_BACKOFF = bool("hmc.assets.backoff");
	Property<Boolean> ALWAYS_DOWNLOAD_ASSETS_INDEX = bool("hmc.always.download.assets.index");