[caissedepargne] Add missing virtual keyboard hash to list
Fixes error below:
File "/home/user/data/weboob-data/modules/2.1/caissedepargne/pages.py", line 243, in __init__
super(CaissedepargneNewKeyboard, self).__init__(code_to_filedata)
File "/weboob/weboob/tools/captcha/virtkeyboard.py", line 284, in __init__
raise VirtKeyboardError("Symbol '%s' not found; all symbol hashes are available in %s" % (char, path))
weboob.tools.captcha.virtkeyboard.VirtKeyboardError: Symbol '1' not found; all symbol hashes are available in /tmp/weboob_session_rf1rwor3