Update Bootstrapper for WinAppSDK 2.x/SemVer (#6180)#6360

Dreynor87 wants to merge 1 commit intorelease/2.0-experimentalmicrosoft/WindowsAppSDK:release/2.0-experimentalfrom

user/chriwall/SemVerOnExpmicrosoft/WindowsAppSDK:user/chriwall/SemVerOnExpCopy head branch name to clipboard