Add period

Author: JakeLegendXIII

articles/getting_to_know/howto/HowTo_AutomaticRotation.md

@@ -1,6 +1,6 @@
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 title: How to manage automatic rotation and scaling
-description: Demonstrates how to manage rotation and scaling based on device orientation
+description: Demonstrates how to manage rotation and scaling based on device orientation.
 requireMSLicense: true
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