[j.1] exempt some examples from tests for Python < 3.9, as dict | is unsupported ()

Merging branch 'j.1'  into 'main'.

See merge request !2510

Tests/Examples/CMakeLists.txt

@@ -150,8 +150,10 @@ run_example(fit/specular/Specular1Par)
 run_example(fq/Sphere)
 
 test_example(offspec/Offspec1 2e-10)
-test_example(offspec/OffspecLambda 2e-10) # issue #711
-test_example(offspec/OffspecResolved 2e-10) # issue #711
+if (Python3_VERSION_MINOR GREATER 8)
+    test_example(offspec/OffspecLambda 2e-10) # issue #711
+    test_example(offspec/OffspecResolved 2e-10) # issue #711
+endif()
 
 test_example(scatter2d/ApproximationDA 2e-10)
 test_example(scatter2d/ApproximationLMA 2e-10)