Update test result spec with check-result

spec/tests/result.fmf

@@ -32,6 +32,15 @@ description: |
 
         .. versionadded:: 1.35
 
+    Additionally, the `check-result` attribute can be used to specify
+    how check results should be interpreted:
+
+    respect
+        check results are respected (test fails if any check fails) - default value
+    ignore
+        check results are ignored (test result is not affected by check failures)
+
+        .. versionadded:: 1.37
 
 example:
   - |
@@ -42,7 +51,12 @@ example:
     # Look for $TMT_TEST_DATA/results.yaml (or results.json) with custom results
     result: custom
 
+  - |
+    # Ignore check failures
+    check-result: ignore
+
 link:
   - implemented-by: /tmt/base.py
   - verified-by: /tests/execute/result
   - verified-by: /tests/execute/result/custom
+  - verified-by: /tests/execute/result/check_results