Prepare to publish v28 (#919)

Co-authored-by: Robert Hunt <Freely.Given.org@gmail.com>
Reviewed-on: https://git.door43.org/unfoldingWord/en_ust/pulls/919
Co-authored-by: Robert Hunt <robh@noreply.door43.org>
Co-committed-by: Robert Hunt <robh@noreply.door43.org>

manifest.yaml

@@ -49,12 +49,12 @@ dublin_core:
   description: "An open-licensed translation, intended to provide a ‘functional’ understanding of the Bible. It increases the translator’s understanding of the text by translating theological terms as descriptive phrases."
   format: 'text/usfm3'
   identifier: 'ust'
-  issued: '2021-06-28'
+  issued: '2021-07-23'
   language:
     direction: 'ltr'
     identifier: 'en'
     title: 'English'
-  modified: '2021-06-28'
+  modified: '2021-07-23'
   publisher: 'unfoldingWord'
   relation:
     - 'en/tw'
@@ -77,7 +77,7 @@ dublin_core:
   subject: 'Aligned Bible'
   title: 'unfoldingWord® Simplified Text'
   type: 'bundle'
-  version: '27'
+  version: '28'
 
 checking:
   checking_entity:
@@ -613,4 +613,3 @@ projects:
     sort: 66
     path: './67-REV.usfm'
     categories: [ 'bible-nt' ]
-