fix: correct OSLC Query result handling

[berezovskyi]

Fixes #185

[codecov]

Codecov Report

Attention: Patch coverage is 55.00000% with 126 lines in your changes missing coverage. Please review.

Project coverage is 45.46%. Comparing base (4096487) to head (e36db74).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...4Net.DotNetRdfProvider/RdfXmlMediaTypeFormatter.cs	54.47%	52 Missing and 9 partials ⚠️
.../OSLC4Net.Client/Oslc/Resources/OslcQueryResult.cs	61.15%	35 Missing and 12 partials ⚠️
...et_SDK/OSLC4Net.Client/Oslc/Resources/OslcQuery.cs	28.00%	12 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #203      +/-   ##
==========================================
+ Coverage   43.07%   45.46%   +2.38%     
==========================================
  Files         158      158              
  Lines       15899    16019     +120     
  Branches     1177     1194      +17     
==========================================
+ Hits         6849     7283     +434     
+ Misses       8786     8427     -359     
- Partials      264      309      +45     

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