override Rust build to nightly toolchain

Author: tazz4843

.github/workflows/rust.yml

@@ -19,6 +19,12 @@ jobs:
             -   name: Cache Packages
                 uses: Swatinem/[email protected]
 
+            -   uses: actions-rs/toolchain@v1
+                with:
+                    profile: minimal
+                    toolchain: nightly
+                    override: true
+
             -   name: Build
                 run: cargo build --release