fix: add missing account IDs for af-south-1 and eu-south-1 (#1949)

Author: ajaykarpur

src/sagemaker/image_uri_config/sklearn.json

@@ -35,6 +35,7 @@
         "0.23-1": {
             "py_versions": ["py3"],
             "registries": {
+                "af-south-1": "510948584623",
                 "ap-east-1": "651117190479",
                 "ap-northeast-1": "354813040037",
                 "ap-northeast-2": "366743142698",
@@ -49,6 +50,7 @@
                 "eu-west-1": "141502667606",
                 "eu-west-2": "764974769150",
                 "eu-west-3": "659782779980",
+                "eu-south-1": "978288397137",
                 "me-south-1": "801668240914",
                 "sa-east-1": "737474898029",
                 "us-east-1": "683313688378",