nano: update to 2.9.6

nano: update to 2.9.6

Nano 2.9.6 release notes:

GNU nano 2.9.6 "Gomance" fixes a crash in word completion,
makes --enable-altrcname work again, improves the fluidity
of scrolling when using the touchpad, tweaks the syntaxes
for shell scripts and PO files, makes a replacing session
go always forward by default, no longer inserts a newline
after an external spell check of a selected region, always
accepts the English Y and N (and A) at a yes-no prompt in
any locale, and solves a few hypothetical bugs.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>