fix: Increase the number of sections for target grouping

[ilia3546]

Issue:

When we use command xcodebuild build-for-testing with Xcode 16 result .xcactivitylog doesn't contains target markers in first 15 records.

As result target grouping doesn't work properly

Solution:

I have increased the number of number of sections for target grouping from 15 to 50 records.

Result:

Now target grouping works properly with xcodebuild from Xcode 16