changed setup-rust v1 to v2

Author: sepehr455

.github/workflows/publish-upon-release.yml

@@ -15,7 +15,9 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up Rust
-        uses: actions/setup-rust@v1
+        uses: actions/setup-rust@v2
+        with:
+          toolchain: stable
 
       - name: Install cargo-release
         run: cargo install cargo-release