CompatHelper: bump compat for Zygote to 0.7 for package test, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Zygote package from 0.5.4, 0.6 to 0.5.4, 0.6, 0.7 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 85.39%. Comparing base (0c3d3d0) to head (298bd9e).
Report is 15 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2453   +/-   ##
=======================================
  Coverage   85.39%   85.39%           
=======================================
  Files          21       21           
  Lines        1588     1588           
=======================================
  Hits         1356     1356           
  Misses        232      232           

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[coveralls]

Pull Request Test Coverage Report for Build 12615015383

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 76.865%

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Totals
Change from base Build 12434902283:	0.0%
Covered Lines:	1216
Relevant Lines:	1582

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💛 - Coveralls

[penelopeysm]

This is blocked by DynamicPPL, which is in turn blocked by DifferentiationInterface and LogDensityProblemsAD (as of time of writing), see TuringLang/DynamicPPL.jl#771