archlinux: fix package upgrade command handling (#768)

pacman uses `-u` instead of `upgrade` to trigger a system upgrade, fix
the command handling so this is properly accounted for. as is, the
resulting command attempts to install a (non-existent) `upgrade` package

Co-authored-by: Rick Harding <rharding@mitechie.com>

cloudinit/distros/arch.py

@@ -152,6 +152,8 @@ def package_command(self, command, args=None, pkgs=None):
         elif args and isinstance(args, list):
             cmd.extend(args)
 
+        if command == "upgrade":
+            command = "-u"
         if command:
             cmd.append(command)
 

tools/.github-cla-signers

@@ -26,6 +26,7 @@ nishigori
 olivierlemasle
 omBratteng
 onitake
+qubidt
 riedel
 slyon
 smoser