Update install.sh

Fix s390x

install.sh

@@ -29,6 +29,8 @@ if [[ $arch == "x86_64" || $arch == "x64" || $arch == "amd64" ]]; then
     arch="amd64"
 elif [[ $arch == "aarch64" || $arch == "arm64" ]]; then
     arch="arm64"
+elif [[ $arch == "s390x" ]]; then
+    arch="s390x"
 else
     arch="amd64"
     echo -e "${red} Failed to check system arch, will use default arch: ${arch}${plain}"