ObjectActivityType is an IRI, not an Object

[deathtenk]

Filing an issue about the xAPI Profiles specification? Please include the following

• [ ] Which part/parts of the specification are at issue? The documentation

• [ ] What is your understanding of what the spec means in these parts? The ObjectActivityType under StatementTemplate is defined as an Object in the spec documentation however it's actually an IRI.

• [ ] Related to your implementation, what's the use case you're trying to achieve? What are the user stories you're trying to support? Not applicable

• [ ] How you would like the specification to be improved? Just a minor typo in the documentation.

[fugu13]

Good catch, will fix

[fugu13]

Change made, new release made