test(ci): run tests with sudo for ICMP socket permissions

Raw ICMP sockets require CAP_NET_RAW capability or root privileges.
GitHub Actions runners don't have this by default, so run tests with
sudo. The -E flag preserves environment variables (CARGO_HOME, etc.)
and $(which cargo) ensures the correct binary is found.

Author: ThinkerDreamer

.github/workflows/ci.yml

@@ -61,4 +61,5 @@ jobs:
         with:
           toolchain: ${{ matrix.rust }}
 
-      - run: cargo test
+      - name: Run tests
+        run: sudo -E $(which cargo) test