testing fix for espruino#2609 setting workflow builds back to RELEASE from DEBUG

Author: SimonGAndrews

.github/workflows/build.yml

@@ -165,7 +165,7 @@ jobs:
     - name: make ${{ matrix.board }}
       env:
         TRAVIS: 1
-        DEBUG: 1
+        RELEASE: 1
         BOARD: ${{ matrix.board }} 
         UPLOADTOKEN: ${{ secrets.UPLOADTOKEN }}  
       run: |