Update README.md

README.md

 <string>Some description</string>
 <key>NSMotionUsageDescription</key>
 <string>Some description</string>
-
+```
 This is required because during the phase of processing in the App Store
 submission, the system detects that you app contains code to request the
 permission `X` but don't have the `UsageDescription` key and then it rejects the