Correct a documentation's url.
Correct a documentation's url.

pombredanne/product-definition-center,pombredanne/product-definition-center,pombredanne/product-definition-center,release-engineering/product-definition-center,release-engineering/product-definition-center,release-engineering/product-definition-center,pombredanne/product-definition-center,product-definition-center/product-definition-center,product-definition-center/product-definition-center,release-engineering/product-definition-center,product-definition-center/product-definition-center,product-definition-center/product-definition-center