Writing Helpful Bug Reports for Minecraft
In the sentence at the bottom of the article ("Now that you know how to write awesome bug reports for us, help us improve Minecraft by reporting bugs you find"), "reporting bugs you find" has a hyperlink to a web.archive.org version of the tracker instead of the live tracker.
It seems to be straight out copy-and-pasted from an archived version of the article which was archived before help.mojang.com was moved to help.minecraft.net.