Fix Chinese lang codes

zh_CHS to zh_Hans
zh_CHT to zh_Hant

Fix #419

MANIFEST

@@ -101,7 +101,7 @@ po/pod/pt_BR.po
 po/pod/ru.po
 po/pod/sr_Cyrl.po
 po/pod/uk.po
-po/pod/zh_CHS.po
+po/pod/zh_Hans.po
 po/pod/zh_Hant.po
 msguntypot
 po4a

po/pod/zh_CHS.po → po/pod/zh_Hans.po

@@ -11,7 +11,7 @@ msgstr ""
 "Last-Translator: taotieren <[email protected]>\n"
 "Language-Team: Chinese (Simplified) <https://hosted.weblate.org/projects/"
 "po4a/po4a-doc/zh_Hans/>\n"
-"Language: zh_CHS\n"
+"Language: zh_Hans\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
@@ -21,7 +21,7 @@ msgstr ""
 #. type: Attribute 'xml:lang' of: <refentry>
 #: share/doc/po4a-display-man.xml:1 share/doc/po4a-display-pod.xml:1
 msgid "en"
-msgstr "zh_CHS"
+msgstr "zh_Hans"
 
 #. type: Content of: <refentry><refentryinfo>
 #: share/doc/po4a-display-man.xml:2

po/pod/zh_Hant.po

@@ -22,7 +22,7 @@ msgstr ""
 #. type: Attribute 'xml:lang' of: <refentry>
 #: share/doc/po4a-display-man.xml:1 share/doc/po4a-display-pod.xml:1
 msgid "en"
-msgstr "zh_CHS"
+msgstr "zh_Hant"
 
 #. type: Content of: <refentry><refentryinfo>
 #: share/doc/po4a-display-man.xml:2