README: Tweak some details

Signed-off-by: Michael Kerrisk (man-pages) <mtk.manpages@gmail.com>
diff --git a/man-pages-posix-2017/README b/man-pages-posix-2017/README
index 191ab1d..465bfb0 100644
--- a/man-pages-posix-2017/README
+++ b/man-pages-posix-2017/README
@@ -1,11 +1,8 @@
-These are pages from POSIX.1-2008, Technical Corrigendum 1.
-Since TC1 appeared in 2013, it is also known as POSIX.1-2013.
-
-This package contains the POSIX man pages (pages in sections
+This package contains the POSIX.1-2017 man pages (pages in sections
 except 0p, 1p, and 3p). Some more information is given in the
 `Announce' file.  Some background on UNIX standards, including
-POSIX, can be found in the standards(7) page provided as part
-of the separate Linux man-pages package.
+POSIX, can be found in the standards(7) page provided as part of
+the separate Linux man-pages package.
 
 Install by copying to your favourite location.
 "make install" will just copy them to /usr/share/man/man[013]p.