Add 403 code as an expected result to ReDATA

After figshare's implementation of bot protection, there are a lot more false positives that return an HTTP 403 code.

.upptimerc.yml

@@ -15,6 +15,8 @@ sites:
       - yhan818
       - zoidy
       - HafeezOJ
+    expectedStatusCodes:      
+      - 403      
   - name: ReDATA (stage)
     url: $SECRET_SITE_1
     assignees:
@@ -23,6 +25,7 @@ sites:
       - HafeezOJ
     expectedStatusCodes:
       - 401
+      - 403
   - name: Campus Repository
     url: https://repository.arizona.edu/
     maxResponseTime: 5000