[CI] Improve .cirrus.yml

.cirrus.yml

@@ -7,23 +7,28 @@ task:
         matrix:
           - JULIA_VERSION: 1.6
           - JULIA_VERSION: 1
-    # - name: Linux ARMv8
-    #   arm_container:
-    #     image: ubuntu:latest
+    - name: Linux ARMv8
+      arm_container:
+        image: ubuntu:latest
       env:
         - JULIA_VERSION: 1
     - name: musl Linux
       container:
         image: alpine:3.14
       env:
         - JULIA_VERSION: 1
-    - name: macOS M1
+    - name: MacOS M1
       macos_instance:
         image: ghcr.io/cirruslabs/macos-monterey-base:latest
       env:
         - JULIA_VERSION: 1
   install_script: |
     URL="https://raw.githubusercontent.com/ararslan/CirrusCI.jl/master/bin/install.sh"
+    set -x
+    if [ "$(uname -s)" = "Linux" ] && command -v apt; then
+        apt update
+        apt install -y curl
+    fi
     if command -v curl; then
         sh -c "$(curl ${URL})"
     elif command -v wget; then