fix(jsonschema): allow xml property

[tdakkota]

For #939

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01 ⚠️

Comparison is base (7d03db1) 72.35% compared to head (1cbd2e7) 72.35%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #945      +/-   ##
==========================================
- Coverage   72.35%   72.35%   -0.01%     
==========================================
  Files         190      190              
  Lines       14563    14561       -2     
==========================================
- Hits        10537    10535       -2     
  Misses       3500     3500              
  Partials      526      526              

Impacted Files	Coverage Δ
jsonschema/parser.go	83.72% <100.00%> (-0.07%)	⬇️

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