qt6base: rebuild with lib blake2

[yopito]

General

• This is a new package and it conforms to the quality requirements

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

[Johnnynator]

lgtm, will push this together with qt 6.1.1 which should be released early next week.

[yopito]

Fine for me.