chore: Translate pressbooks-multi-institution.pot in zh

88% of minimum 25% translated source file: 'pressbooks-multi-institution.pot'
on 'zh'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

languages/pressbooks-multi-institution-zh.po

@@ -369,11 +369,11 @@ msgstr "新加"
 
 #: resources/views/institutions/totals.blade.php:1
 msgid "Book and User Totals"
-msgstr ""
+msgstr "书籍和用户总数"
 
 #: resources/views/institutions/totals.blade.php:6
 msgid "Type"
-msgstr ""
+msgstr "类型"
 
 #: resources/views/partials/errors/duplicate-domain.blade.php:1
 msgid "The email domain %s is already in use with %s."