use commit hash as tag for testing releases

.github/workflows/build.yml

@@ -31,15 +31,9 @@ jobs:
       - name: Build Electron App
         run: npm run dist
 
-      - name: Get Tag
-        id: get_tag
-        if: startsWith(github.ref, 'refs/tags/')
-        run: |
-          echo ${GITHUB_REF/refs\/tags\//}
-          echo ::set-output name=TAG::${GITHUB_REF/refs\/tags\//}
-
       - name: Create Release
         id: create_release
         uses: ncipollo/release-action@v1
         with:
+          tag: "$(git rev-parse --short=7 HEAD)"
           artifacts: "dist/*-win-installer.exe,dist/*-win-portable.exe"