CompatHelper: bump compat for OrderedCollections to 2 for package test, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the OrderedCollections package from 1 to 1, 2 for package test.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.31%. Comparing base (9ebf18f) to head (b2d444a).

❗ There is a different number of reports uploaded between BASE (9ebf18f) and HEAD (b2d444a). Click for more details.

HEAD has 5 uploads less than BASE

Flag	BASE (9ebf18f)	HEAD (b2d444a)
	11	6

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #170       +/-   ##
===========================================
- Coverage   89.39%   37.31%   -52.08%     
===========================================
  Files          16       16               
  Lines        1056     1037       -19     
===========================================
- Hits          944      387      -557     
- Misses        112      650      +538     

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[github-actions]

AbstractPPL.jl documentation for PR #170 is available at:
https://TuringLang.github.io/AbstractPPL.jl/previews/PR170/