fix: Fix build

Author: jniebuhr

.github/workflows/build.yml

@@ -44,7 +44,7 @@ jobs:
       - name: Build display
         run: pio run -e display
       - name: Build headless
-        run: pio run -e display-display
+        run: pio run -e display-headless
       - name: Rename firmware files
         run: |
           mv .pio/build/controller/firmware.bin out/board-firmware.bin