Fixed DESCRIPTION file's License line to point to the ./LICENSE file: ln:16

Author: ItsMeForLua

DESCRIPTION

@@ -13,7 +13,7 @@ Description: Provides a fast and efficient bridge between R and the Concise
     low overhead are critical. The package provides two primary functions:
     `encode()` to serialize R objects into raw byte vectors and `decode()`
     to deserialize them back into R objects.
-License: LGPL (>= 3)
+License: LGPL (>= 3) + file LICENSE
 Encoding: UTF-8
 URL: https://github.com/ItsMeForLua/RCBOR
 BugReports: https://github.com/ItsMeForLua/RCBOR/issues