[ALSA] Use standard form for URL

Sound Core
Use the standard form with <> for URL in Kconfig help texts.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/Kconfig

@@ -46,7 +46,7 @@ config SND
 	  Say 'Y' or 'M' to enable ALSA (Advanced Linux Sound Architecture),
 	  the new base sound system.
 
-	  For more information, see http://www.alsa-project.org/
+	  For more information, see <http://www.alsa-project.org/>
 
 source "sound/core/Kconfig"