Fix The River's Gift. to The River's Gift (#339)

Just did a simple find/replace which I think should work!

card_db_src/xx/cards_xx.json

@@ -2213,9 +2213,9 @@
         "description": "Gain a Silver.",
         "used": true
     },
-    "The River's Gift.": {
+    "The River's Gift": {
         "extra": "You draw the card after drawing your hand for your next turn.",
-        "name": "The River's Gift.",
+        "name": "The River's Gift",
         "description": "+1 Card at the end of this turn.<br>(Keep this until Clean-up.)",
         "used": true
     },