Fix inconsistent elements in en

Author: cia-rana

en/SUMMARY.md

@@ -63,7 +63,7 @@
 	* [Encrypt and decrypt data](09.6.md)
 	* [Summary](09.7.md)
 * [Internationalization and localization](10.0.md)
-	* [Time zone](10.1.md)
+	* [Setting the default region](10.1.md)
 	* [Localized resources](10.2.md)
 	* [International sites](10.3.md)
 	* [Summary](10.4.md)
@@ -79,7 +79,7 @@
 	* [Backup and recovery](12.4.md)
 	* [Summary](12.5.md)
 * [Build a web framework](13.0.md)
-	* [Project program](13.1.md)
+	* [Project planning](13.1.md)
 	* [Customized routers](13.2.md)
 	* [Design controllers](13.3.md)
 	* [Logs and configurations](13.4.md)
@@ -94,4 +94,4 @@
 	* [pprof](14.6.md)
 	* [Summary](14.7.md)
 * [References](ref.md)
-* [preface](preface.md)
+* [preface](preface.md)