remove execute permissions from ANNOUNCE file (RHEL-101067)

The execute bits were added by the iconv utility, which was used to
convert the file from ISO-8859-1 to UTF-8. However, that file is in
ASCII since ncurses-5.8, so the conversion is no longer needed and can
be removed.

Resolves: RHEL-101067

ncurses.spec

@@ -121,11 +121,6 @@ The ncurses-static package includes static libraries of the ncurses library.
 %patch14 -p1 -b .setuid
 %patch15 -p1 -b .cve-2022-29458
 
-for f in ANNOUNCE; do
-    iconv -f iso8859-1 -t utf8 -o ${f}{_,} &&
-        touch -r ${f}{,_} && mv -f ${f}{_,}
-done
-
 %build
 common_options="\
     --enable-colorfgbg \