fix: ignore shellcheck issue

Author: josegonzalez

sshcommand

@@ -94,6 +94,7 @@ fn-verify-file() {
   local key line=0
   local TMP_KEY_FILE
   TMP_KEY_FILE=$(mktemp "/tmp/dokku-${DOKKU_PID}-${FUNCNAME[0]}.XXXXXX")
+  # shellcheck disable=SC2064
   trap "rm -rf '$TMP_KEY_FILE' >/dev/null" RETURN INT TERM EXIT
 
   SSHCOMMAND_IGNORE_LIST_WARNINGS="${SSHCOMMAND_IGNORE_LIST_WARNINGS:-false}"