Apply API documentation schema fix.

Author: cc-wong

api/doc/swagger.yaml

@@ -196,7 +196,7 @@ paths:
                   description: |
                     The number of weeks to calculate. \
                     Use a negative number to calculate past dates.
-                  type: int
+                  type: integer
             examples:
               1 - Calculate future date:
                 value:
@@ -329,4 +329,4 @@ paths:
         Same as the `GET` request but skips the response body.
       responses:
         200:
-          description: OK
+          description: OK