build: specify rust stable for github actions

.github/workflows/release.yml

@@ -22,7 +22,6 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Compile and release
-        id: compile
         uses: rust-build/rust-build.action@v1.4.3
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}