Add support for arm64 image

Author: kou

ci/scripts/util_free_space.sh

@@ -87,8 +87,8 @@ sudo rm -rf /opt/hostedtoolcache/PyPy || :
 # 376MB
 sudo rm -rf /opt/hostedtoolcache/node || :
 # Remove Web browser packages
-sudo apt purge -y \
-  firefox \
-  google-chrome-stable \
-  microsoft-edge-stable
+sudo apt purge -y firefox
+sudo apt purge -y google-chrome-stable
+# microsoft-edge-stable isn't installed on arm64 image.
+sudo apt purge -y microsoft-edge-stable || :
 df -h