Updated endpoints.json and partitions.json.

Author: AWS

.changes/next-release/feature-AWSSDKforJavav2-0443982.json

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

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

@@ -3395,6 +3395,7 @@
       },
       "cassandra" : {
         "endpoints" : {
+          "af-south-1" : { },
           "ap-east-1" : { },
           "ap-northeast-1" : { },
           "ap-northeast-2" : { },