Update relnotes

doc/relnotes/README.md

@@ -13,6 +13,7 @@ evil organizations.
 # SilentDragon 1.3.1 "Omnicompetent Okapi"
 
 ```
+ 233 files changed, 77483 insertions(+), 16095 deletions(-)
 ```
 
   * SD is now able to be a GUI wallet for DragonX, which is called SilentDragonX (SDX).