Release image version 1.39-7.4-20230731-0 (#376)

Author: AndrewKostka

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 Tags have the format: `<MediaWiki core version>-<PHP Version>-<date>-<build number>`
 
+## 1.39-7.4-20230731-0
+- Show a reduced Wikibase copyright notice
+- Reuse Wikibase's copyright message builder in EntitySchema
+
 ## 1.39-7.4-20230725-0
 - Update links in Wikibase item and property creation summaries