Update royalty-free.md with last updated date

Author: odinserj

licensing/royalty-free.md

@@ -81,4 +81,6 @@ This License Agreement may be modified only by a written instrument signed by an
 
 This License Agreement is governed by the law of the State of Oregon, United States (notwithstanding conflicts of laws provisions), and all parties irrevocably submit to the jurisdiction of the courts of the State of Oregon and further agree to commence any litigation which may arise hereunder in the state or federal courts located in the judicial district of Multnomah County, Oregon, US.
 
-If the Software or any related documentation is licensed to the U.S. government or any agency thereof, it will be deemed to be "commercial computer software" or "commercial computer software documentation", pursuant to DFAR Section 227.7202 and FAR Section 12.212. Any use of the Software or related documentation by the U.S. government will be governed solely by the terms of this License Agreement.
+If the Software or any related documentation is licensed to the U.S. government or any agency thereof, it will be deemed to be "commercial computer software" or "commercial computer software documentation", pursuant to DFAR Section 227.7202 and FAR Section 12.212. Any use of the Software or related documentation by the U.S. government will be governed solely by the terms of this License Agreement.
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+This document was last updated on May 25, 2018