fix typo in TF_CONFIG example
@@ -13,7 +13,7 @@ has to be run on each node with the appropriate values of parameters set as foll
**TF_CONFIG**
-The TF_CONFIG environment variable has to be appropriatly configured depending
+The TF_CONFIG environment variable has to be appropriately configured depending
on the set of nodes taking part in the computations.
For example, a training on two nodes gl01 and gl02 would require the following
settings of TF_CONFIG:
