ci: 取消codecov的fail_ci_if_error (#77)

.github/workflows/rust.yml

@@ -46,5 +46,5 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }} # not required for public repos
           files: lcov.info
-          fail_ci_if_error: true
+          fail_ci_if_error: false