Update Phrases

Author: pykettk

app/code/Magento/Backend/i18n/en_US.csv

@@ -240,7 +240,10 @@ password,password
 "Reload Data","Reload Data"
 "Browse Files...","Browse Files..."
 Magento,Magento
+"Mage-OS","Mage-OS"
 "Copyright © %1 Magento Commerce Inc. All rights reserved.","Copyright © %1 Magento Commerce Inc. All rights reserved."
+"Thank you for choosing Mage-OS.","Thank you for choosing Mage-OS."
+"Learn more about Mage-OS.","Learn more about Mage-OS."
 "ver. %1","ver. %1"
 "Magento Admin Panel","Magento Admin Panel"
 "Account Setting","Account Setting"