[Documentation] The "removing 5s. delay while boot" doesn't contain proper link

[hrtk]

It took me a while to figure out that the link provided to download the latest jumper firmware on https://digistump.com/wiki/digispark/tricks isn't quite correct.
You need to change the github tag to an earlier version to get the github firmware.
As of today it is tag v1.1 i.e. this one https://github.com/micronucleus/micronucleus/blob/v1.11/upgrade/releases/micronucleus-1.06-jumper-v2-upgrade.hex