Make explicit LRS SHOULD re-query when more link is accessed

Reading this section it's pretty clear that it's envisaged that the LRS would re-run the query for example: 

```` An LRS MAY include all necessary information within the more property IRL to continue the query to avoid the need to store IRLs and associated query data. ````

I've listed this clarifying requirement as a SHOULD* but I almost think we could make it a MUST right away as it's only clarifying what's clearly the expected behavior.