Update linear_learner_mnist.ipynb (aws#106)

Author: JunLyu

introduction_to_amazon_algorithms/linear_learner_mnist/linear_learner_mnist.ipynb

@@ -205,7 +205,7 @@
     "\n",
     "Again, we'll use the Amazon SageMaker Python SDK to kick off training, and monitor status until it is completed.  In this example that takes between 7 and 11 minutes.  Despite the dataset being small, provisioning hardware and loading the algorithm container take time upfront.\n",
     "\n",
-    "First, let's specify our containers.  Since we want this notebook to run in all 4 of Amazon SageMaker's regions, we'll create a small lookup.  More details on algorithm containers can be found in [AWS documentation](https://docs-aws.amazon.com/sagemaker/latest/dg/im-algo-docker-registry-paths.html)."
+    "First, let's specify our containers.  Since we want this notebook to run in all 4 of Amazon SageMaker's regions, we'll create a small lookup.  More details on algorithm containers can be found in [AWS documentation](https://docs-aws.amazon.com/sagemaker/latest/dg/sagemaker-algo-docker-registry-paths.html)."
    ]
   },
   {