Update the Flutter SDK

[v.zdravkovic_fitpass]

Hi, I saw that you guys have merged the new Flutter SDKs to your tech stack, but haven’t since released to to the public.
Can you share when will the new stacks be available with the Flutter 2.10.3 SDK version.
PR: [IN-3369] Flutter updated: 2.10.3 and 1.22.6 (#602) · bitrise-io/osx-box-bootstrap@41dc78d · GitHub
Which mentions the revision: v2022_03_22

While the current revision of the stack is: v2022_02_19_1
As seen here: bitrise.io/osx-xcode-13.3.x.log at master · bitrise-io/bitrise.io · GitHub

We lose 2 mins of each build whenever we want to build our projects. It would be awesome if we can lower that down by updating the SDK version.

Thank you.