change the version string from 1.2-1-1 to 1.2.1-1

Author: lxning

src/sagemaker/image_uri_config/sklearn.json

@@ -193,7 +193,7 @@
                 },
                 "repository": "sagemaker-scikit-learn"
             },
-            "1.2-1-1": {
+            "1.2.1-1": {
                 "processors": [
                     "cpu"
                 ],
@@ -437,7 +437,7 @@
                 },
                 "repository": "sagemaker-scikit-learn"
             },
-            "1.2-1-1": {
+            "1.2.1-1": {
                 "processors": [
                     "cpu"
                 ],
@@ -539,4 +539,4 @@
             }
         }
     }
-}
+}