ci: fix macos build

Author: std-microblock

.github/workflows/rust.yml

@@ -139,7 +139,11 @@ jobs:
         toolchain: nightly
         override: true
         components: rustfmt, clippy
+    - name: Build Rust MacOS
+      if: runner.os == 'macOS'
+      run: export CMAKE_POLICY_VERSION_MINIMUM=3.5 && cargo build --verbose --release
     - name: Build Rust
+      if: runner.os != 'macOS'
       run: cargo build --verbose --release
     - name: Create macOS app bundle
       run: |