Update dev notes to ufbt

readme.md

@@ -24,11 +24,16 @@ Alternatively, [NARD flipper add-on](https://github.com/killergeek/nard) works.
 
 ## Development
 
+### Update ASN1
+
  * Install git version of [asnc1](https://github.com/vlm/asn1c) (`brew install asn1c --head` on macos)
  * Run `asn1c -D ./lib/asn1 -no-gen-example -pdu=all seader.asn` in in root to generate asn1c files
- * Checkout or symlink to flipper-firmware's applications_user folder
- * `./fbt fap_seader` to build
- * `./fbt launch_app APPSRC=seader` to build/launch
+
+### Update App
+
+ * Install [UFBT](https://github.com/flipperdevices/flipperzero-ufbt)
+ * `ufbt` to build
+ * `ufbt launch` to launch
 
 ## References