update workflow

Author: dalethomas81

.github/workflows/nightly.yml

@@ -40,9 +40,11 @@ jobs:
 
       - name: Compile sketch for Arduino Mega 2560
         run: |
+          mkdir -p build-out
           arduino-cli compile \
             --fqbn arduino:avr:mega \
             --libraries custom-libraries \
+            --output-dir build-out \
             Source/HamMessenger
 
       - name: List everything in build output
@@ -53,11 +55,16 @@ jobs:
         run: |
           find . -name "*.hex"
 
+      - name: Rename firmware file for release
+        run: |
+          mkdir -p output
+          cp build-out/HamMessenger.ino.hex output/HamMessenger-mega2560.hex
+
       - name: Upload nightly firmware to release
         uses: ncipollo/release-action@v1
         with:
           tag: nightly
           name: Nightly Build
           prerelease: true
           allowUpdates: true
-          artifacts: Source/HamMessenger/build/**/HamMessenger.ino.hex
+          artifacts: output/HamMessenger-mega2560.hex