use github.sha

Author: henkwiedig

.github/workflows/firmware.yml

@@ -32,7 +32,7 @@ jobs:
     steps:
       - name: Build OpenIPC
         env:
-          MSPOSD_VERSION: ${{ env.COMMIT_SHA }}
+          MSPOSD_VERSION: ${{ github.sha }}
         run: |
           git clone https://github.com/openipc/firmware --depth=1
           cd firmware