docs: Nightly build link fixed

README.md

@@ -4,4 +4,4 @@ Hex Viewer application for Flipper Zero!
 
 ![Hex Viewer app!](https://habrastorage.org/r/w1560/getpro/habr/upload_files/46e/28a/d97/46e28ad973d144b123a4ce513c895d18.png)
 
-[Link to FAP](https://nightly.link/QtRoS/flipper-zero-hex-viewer/workflows/build_dev/master/hex_viewer.fap.zip)
+[Link to FAP](https://nightly.link/QtRoS/flipper-zero-hex-viewer/actions/artifacts/448677581.zip)