Fix a prop-types warning on the tag portal
Fix a prop-types warning on the tag portal

HashLink was annotated using React prop-types as having children:
PropTypes.node, but sometimes its children would be an array of several
nodes instead. This worked fine, but produced an error in the browser
console in debug mode.

Discordius/Lesswrong2,Discordius/Telescope,Discordius/Lesswrong2,Discordius/Lesswrong2,Discordius/Telescope,Discordius/Lesswrong2,Discordius/Telescope,Discordius/Telescope