Typo fix ('publically' is rare, poss. non-standard)

Doc/lib/libunicodedata.tex

@@ -14,7 +14,7 @@
 This module provides access to the Unicode Character Database which
 defines character properties for all Unicode characters. The data in
 this database is based on the \file{UnicodeData.txt} file version
-4.1.0 which is publically available from \url{ftp://ftp.unicode.org/}.
+4.1.0 which is publicly available from \url{ftp://ftp.unicode.org/}.
 
 The module uses the same names and symbols as defined by the
 UnicodeData File Format 4.1.0 (see