Post release truncation of UpcomingReleaseNotes.md

Author: ViliusSutkus89

UpcomingReleaseNotes.md

@@ -1,7 +0,0 @@
-Update pdf2htmlEX to 0.18.8-rc2 (unofficial release, https://github.com/pdf2htmlEX/pdf2htmlEX/pull/154 )
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-Using Fontforge-20230101 and Poppler-23.12.0 .
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-Removed dependency-builder, using [ndkports](https://github.com/ViliusSutkus89/ndkports) instead.
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-Built with NDK 26, which requires raising minSdk to 21 (Android 5 - Lollipop).