Testing night rust toolchain against apache rejection criteria

Author: timsaucer

.github/workflows/build.yml

@@ -131,7 +131,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: dtolnay/rust-toolchain@v1
+      - uses: dtolnay/rust-toolchain@nightly
 
       - run: rm LICENSE.txt
       - name: Download LICENSE.txt