Updated endpoints.json.

Author: AWS

.changes/next-release/feature-AWSSDKforJavav2-bedacd4.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS SDK for Java v2",
+    "contributor": "",
+    "description": "Updated service endpoint metadata."
+}

core/regions/src/main/resources/software/amazon/awssdk/regions/internal/region/endpoints.json

@@ -6736,6 +6736,16 @@
           "cn-northwest-1" : { }
         }
       },
+      "docdb" : {
+        "endpoints" : {
+          "cn-northwest-1" : {
+            "credentialScope" : {
+              "region" : "cn-northwest-1"
+            },
+            "hostname" : "rds.cn-northwest-1.amazonaws.com.cn"
+          }
+        }
+      },
       "ds" : {
         "endpoints" : {
           "cn-north-1" : { },