github: add simmel to build.yml

Signed-off-by: Sean Cross <[email protected]>

Author: xobs

.github/workflows/build.yml

@@ -229,6 +229,7 @@ jobs:
         - "seeeduino_xiao"
         - "serpente"
         - "shirtty"
+        - "simmel"
         - "snekboard"
         - "sparkfun_lumidrive"
         - "sparkfun_nrf52840_mini"