Update TS 04.60 references to new TS 44.060

Change-Id: Ib7c3a74b502b2251da2f7b9d6d711f3e32133bc3
diff --git a/src/rlc.h b/src/rlc.h
index 187a70e..bcc738c 100644
--- a/src/rlc.h
+++ b/src/rlc.h
@@ -376,7 +376,7 @@
 };
 
 extern "C" {
-/* TS 04.60  10.2.2 */
+/* TS 44.060  10.2.2 */
 #if OSMO_IS_LITTLE_ENDIAN
 struct rlc_ul_header {
 	uint8_t	r:1,