Fix Release Failed due to non availability of nightly toolchain

Author: canewsin

.github/workflows/release.yml

@@ -29,6 +29,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          profile: minimal
+          toolchain: nightly
+          override: true
       - uses: taiki-e/upload-rust-binary-action@v1
         with:
           bin: zeronet