CompatHelper: bump compat for AdvancedVI to 0.3, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the AdvancedVI package from 0.2 to 0.2, 0.3.
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 57.38%. Comparing base (1397d69) to head (ba39630).

❗ There is a different number of reports uploaded between BASE (1397d69) and HEAD (ba39630). Click for more details.

HEAD has 64 uploads less than BASE

Flag	BASE (1397d69)	HEAD (ba39630)
	106	42

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2507       +/-   ##
===========================================
- Coverage   84.88%   57.38%   -27.51%     
===========================================
  Files          21       21               
  Lines        1628     1619        -9     
===========================================
- Hits         1382      929      -453     
- Misses        246      690      +444     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[coveralls]

Pull Request Test Coverage Report for Build 13867614024

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 442 unchanged lines in 10 files lost coverage.
• Overall coverage decreased (-27.6%) to 48.976%

---

Files with Coverage Reduction	New Missed Lines	%
src/mcmc/emcee.jl	2	88.46%
src/variational/VariationalInference.jl	4	0.0%
src/mcmc/particle_mcmc.jl	10	80.13%
ext/TuringDynamicHMCExt.jl	29	0.0%
src/mcmc/mh.jl	34	58.96%
ext/TuringOptimExt.jl	50	0.0%
src/mcmc/sghmc.jl	50	20.29%
src/stdlib/distributions.jl	53	0.0%
src/variational/advi.jl	56	0.0%
src/optimisation/Optimisation.jl	154	0.0%

Totals
Change from base Build 13811362560:	-27.6%
Covered Lines:	789
Relevant Lines:	1611

---

💛 - Coveralls