Lps 34294 creole: add support to table of contents title attribute

Hi Jorge,

Victor sent a pull request to Miguel with these changes but both of them are going to be out of office for a few weeks so I resend you this pull request because a customer is waiting for the hot fix.

In relation to the issue, it seems that Victor and Miguel discovered a non covered use case after closing the LPS and this pull request covers it. Victor explained it as:

Changed the table_of_contents grammar rule in order to not have collisions between tokens.

Thanks.