Update README.md

Author: QtRoS

README.md

@@ -12,7 +12,7 @@ The app allows you to view various files as HEX
 
 Feel free to send PRs! 
 
-Useful links:
+**Useful links**:
 
 - App URL: https://lab.flipper.net/apps/hex_viewer
 - Catalog's manifest: [flipper-application-catalog/applications/Tools/hex_viewer/manifest.yml](https://github.com/flipperdevices/flipper-application-catalog/blob/main/applications/Tools/hex_viewer/manifest.yml)