Fix CI for MacOS

Author: evgeniy-scherbina

.github/workflows/ci.yml

@@ -74,6 +74,7 @@ jobs:
       run: make deps
 
     - name: Change DNS configuration
+      if: runner.os == 'Linux'
       run: sudo mount --bind /run/systemd/resolve/resolv.conf /etc/resolv.conf
 
 #    - name: Setup tmate session