package/python-idna: replace utf-8 quote by ascii single quote

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-idna/Config.in

@@ -3,7 +3,7 @@ config BR2_PACKAGE_PYTHON_IDNA
 	help
 	  A library to support the Internationalised Domain Names in
 	  Applications (IDNA) protocol as specified in RFC 5891. This
-	  version of the protocol is often referred to as “IDNA2008”
+	  version of the protocol is often referred to as 'IDNA2008'
 	  and can produce different results from the earlier standard
 	  from 2003.