[TEST] add ryml to the conan files for install tests

[dbarker]

Changes

• add the conan recipe for rapidyaml/0.9.0 to the conan files for install testing

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[marcalff]

LGTM, thanks for the fix.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.11%. Comparing base (881daad) to head (821cf05).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3679      +/-   ##
==========================================
+ Coverage   90.10%   90.11%   +0.02%     
==========================================
  Files         221      221              
  Lines        7135     7135              
==========================================
+ Hits         6428     6429       +1     
+ Misses        707      706       -1     

see 1 file with indirect coverage changes

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