add fix xml log4net

Author: vdurante

aspnet-core/src/AbpCompanyName.AbpProjectName.Migrator/log4net.config

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <log4net>
   <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender" >
     <file value="Logs/Logs.txt" />
@@ -16,4 +16,4 @@
     <appender-ref ref="RollingFileAppender" />
     <level value="DEBUG" />
   </root>
-</log4net>
+</log4net>