Update com.newsblur to 14.2 (267)

Summary

The F-Droid build for NewsBlur has been failing since the Android app review code was refactored. The prebuild sed command references a reviewBackCallback end marker that no longer exists, causing sed to delete from line 71 to EOF wiping out the companion object, all setupFeedItems methods, and the class closing brace.

What changed

The upstream NewsBlur repo extracted all Google Play in-app review code into a separate InAppReviewHelper.kt file. The prebuild now replaces that file with a no-op stub instead of doing fragile multi-line sed surgery on FeedItemsList.kt.

This is more robust against future code refactors since F-Droid only needs to replace one self-contained file.

Failing build job: https://gitlab.com/fdroid/checkupdates-bot-fdroiddata/-/jobs/13782637059 Upstream commit: https://github.com/samuelclay/NewsBlur/commit/1e13f1d51f2a6f461d014a7199756ea4cd00e854