feature: add model monitor image accounts for af-south-1 and eu-south-1

Author: nigenda-amazon

src/sagemaker/image_uri_config/model-monitor.json

@@ -3,6 +3,7 @@
     "versions": {
         "": {
             "registries": {
+                "af-south-1": "875698925577",
                 "ap-east-1": "001633400207",
                 "ap-northeast-1": "574779866223",
                 "ap-northeast-2": "709848358524",
@@ -14,6 +15,7 @@
                 "cn-northwest-1": "453252182341",
                 "eu-central-1": "048819808253",
                 "eu-north-1": "895015795356",
+                "eu-south-1": "933208885752",
                 "eu-west-1": "468650794304",
                 "eu-west-2": "749857270468",
                 "eu-west-3": "680080141114",