multipass: fix style

Casks/m/multipass.rb

@@ -2,6 +2,13 @@ cask "multipass" do
   version "1.12.2"
   sha256 "c2994476746369935ff54258a2c764cb6e344f77f64cf09688d55a86245bcbf4"
 
+  on_arm do
+    postflight do
+      File.symlink("/Library/Application Support/com.canonical.multipass/Resources/completions/bash/multipass",
+                   "#{HOMEBREW_PREFIX}/etc/bash_completion.d/multipass")
+    end
+  end
+
   url "https://github.com/canonical/multipass/releases/download/v#{version}/multipass-#{version}+mac-Darwin.pkg"
   name "Multipass"
   desc "Orchestrates virtual Ubuntu instances"
@@ -16,13 +23,6 @@ cask "multipass" do
 
   pkg "multipass-#{version}+mac-Darwin.pkg"
 
-  on_arm do
-    postflight do
-      File.symlink("/Library/Application Support/com.canonical.multipass/Resources/completions/bash/multipass",
-                   "#{HOMEBREW_PREFIX}/etc/bash_completion.d/multipass")
-    end
-  end
-
   uninstall launchctl: "com.canonical.multipassd",
             pkgutil:   "com.canonical.multipass.*",
             delete:    [