Append ARM arch with colon

installJRMC

@@ -443,7 +443,7 @@ init() {
       debian|ubuntu)
         # ARM packages append arch to the package name
         if [[ $MC_ARCH == "arm64" || $MC_ARCH == "armhf" ]]; then
-          MC_PKG+="-${MC_ARCH}"
+          MC_PKG+=":${MC_ARCH}"
         fi
         MC_PKG+="=$MC_VERSION"
         ;;
@@ -2246,7 +2246,7 @@ create_mc_apt_container() {
 			Signed-By: /usr/share/keyrings/jriver-com-archive-keyring.gpg
 			Suites: $MC_REPO
 			Components: main
-			Architectures: $MC_ARCH
+			Architectures: amd64 armhf arm64
 		EOF
     apt-get update -qq' &&
   # If user passes command strings run them in the container