s/URI/IRI/ in http://www.w3.org/TR/sparql11-http-rdf-update/#indirect-graph-identification

Hi Chime

we are just having a discussion about % decoding etc.

Suggested modification to text:

Old text:
[[
SHOULD invoke the indicated operation on the RDF knowledge identified by 
the URI embedded in the query component where the URI is the result of 
percent-decoding the value associated with the /graph/ key.
]]

Suggested text:
[[
SHOULD invoke the indicated operation on the RDF knowledge identified by 
the IRI embedded in the query component where the IRI is the result of 
percent-decoding the value associated with the /graph/ key.
]]