In an attempt to better reward players who are able to complete hard mode encounters in 10-man Ulduar, the next minor content patch will boost the item level of weapon rewards from these encounters from 226 to 232.

According to a post by Zayhm, "Players already with these items should see an increase in the power of these items to better reflect the new item level."

As for the Herald of the Titans achievement, the patch will also increase the requirement from item level 226 to 232. However, the text for the achievement probably won't be changed in the patch and will still reflect the outdated data.