[SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.39.0

[marcalff]

Fixes # (issue)

Changes

Please provide a brief description of the changes here.

• Upgrade to semantic conventions 1.39
• Upgrade to weaver 0.20

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.96%. Comparing base (113a50e) to head (c8d647d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3813      +/-   ##
==========================================
+ Coverage   89.94%   89.96%   +0.02%     
==========================================
  Files         225      225              
  Lines        7167     7167              
==========================================
+ Hits         6446     6447       +1     
+ Misses        721      720       -1     

see 1 file with indirect coverage changes

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[ThomsonTan]

nit: update changelog?