📝 fixed documentation

There was an issue in the documentation example before. Unfortunately, I did not recreate the example outputs.

doc/examples/operator__notequal.link

-<a target="_blank" href="https://wandbox.org/permlink/fYRwW2ctRMeM0Lof"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/NO1FFrAierprHk0j"><b>online</b></a>
\ No newline at end of file

doc/examples/operator__notequal.output

-[1,2,3] == [1,2,4] true
-{"A":"a","B":"b"} == {"A":"a","B":"b"} false
-17 == 17.0 false
-"foo" == "bar" true
+[1,2,3] != [1,2,4] true
+{"A":"a","B":"b"} != {"A":"a","B":"b"} false
+17 != 17.0 false
+"foo" != "bar" true