Fixed two broken links found in weekly check.

Signed-off-by: Kevin Putnam <kevin.putnam@intel.com>

source/guides/stacks/dbrs.rst

@@ -619,7 +619,7 @@ To start a redisfailover instance in Kubernetes run the following
 
 .. _Quick Start Guide: https://software.intel.com/en-us/articles/quick-start-guide-configure-intel-optane-dc-persistent-memory-on-linux
 
-.. _Managing NVDIMMs: https://docs.pmem.io/ndctl-users-guide/managing-nvdimms
+.. _Managing NVDIMMs: https://docs.pmem.io/ndctl-user-guide/managing-nvdimms
 
 .. _Configure, Manage, and Profile: https://software.intel.com/en-us/articles/configure-manage-and-profile-intel-optane-dc-persistent-memory-modules
 

source/tutorials/yubikey-u2f.rst

@@ -18,7 +18,7 @@ One-Time Password (OTP), Smart card, FIDO2, and Universal 2nd Factor (U2F).
 
 A list of `websites that accept U2F authentication with the YubiKey`_
 is available on the Yubico website. See the Yubico website to learn more about
-the Yubikey: https://www.yubico.com/getstarted/meet-the-yubikey/
+the Yubikey: https://www.yubico.com/getstarted/
 
 Prerequisites
 *************