No you idiot.
It wasn't breached, so login data wasn't compromised (besides the username and what could be seen on the account details page).
So unless you got phised, you don't need to change your password.
Gaming Discussions
Change your steam password. You might get hacked now thanks to steam :(
Submitted by dustyroo, 26-12-2015, 01:36 AM, Thread ID: 16126
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