container: hledger-flow: remove potential % interpretation (printf)

Removes potential interpretation of percent signs in various types of
descriptions/notes/labels (otherwise, import may break).

Resolves "fatal: not enough arguments to satisfy format string" under
certain conditions.

container/src/hledger-flow/accounts/etrade/etrade-shared.bash

@@ -2,7 +2,7 @@
 
 # docker-finance | modern accounting for the power-user
 #
-# Copyright (C) 2021-2024 Aaron Fiore (Founder, Evergreen Crypto LLC)
+# Copyright (C) 2021-2025 Aaron Fiore (Founder, Evergreen Crypto LLC)
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -66,6 +66,8 @@ function parse()
 
        printf $7 OFS  # Price
        printf $8 OFS  # Comission
+
+       sub(/%/, "%%", $9)
        printf $9 OFS  # Description
 
        printf direction OFS