package/postgresql: fix minor typo

pgsql as a tool does not exist, it's called psql

Signed-off-by: Pascal de Bruijn <p.debruijn@unilogic.nl>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit d79bab065e13f5c6def3ce1884d684fdf9f9300c)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/postgresql/Config.in

@@ -11,7 +11,7 @@ config BR2_PACKAGE_POSTGRESQL
 	  database system.
 
 	  Enable the readline package to gain readline support in
-	  pgsql (the command line interpreter), which offers
+	  psql (the command line interpreter), which offers
 	  command history and edit functions.
 
 	  Enable the zlib package to gain builtin compression for