use +nightly before build command

Author: colemanirby

.github/workflows/rust.yml

@@ -41,7 +41,7 @@ jobs:
       run: cargo fetch
 
     - name: Build
-      run: cargo build +nightly --verbose
+      run: cargo +nightly build --verbose
 
     - name: Run cargo fmt
       run: cargo +nightly fmt -- --check