Update build.yml

Author: andre-richter

.github/workflows/build.yml

@@ -34,11 +34,9 @@ jobs:
       uses: actions/checkout@v1
 
     - name: Install Rustup (macOS)
-      env:
-        ACTIONS_ALLOW_UNSECURE_COMMANDS: 'true'
       run: |
         curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
-        echo ::add-path::$HOME/.cargo/bin
+        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
       if: runner.os == 'macOS'
 
     - name: Set Rustup profile to minimal