Fix pytorch readme formatting (#566)

Fixes broken readme

examples/mnist-pytorch/README.rst

@@ -1,5 +1,5 @@
 Quickstart Tutorial PyTorch (MNIST)
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+-------------------------------------
 
 This classic example of hand-written text recognition is well suited as a lightweight test when developing on FEDn in pseudo-distributed mode. 
 A normal high-end laptop or a workstation should be able to sustain a few clients. 
@@ -112,8 +112,8 @@ You are now ready to use the API to initialize the system with the compute packa
 - Follow the example in the `Jupyter Notebook <https://github.com/scaleoutsystems/fedn/blob/master/examples/mnist-pytorch/API_Example.ipynb>`__
 
 
-Automate experimentation with several clients:  
------------
+Automate experimentation with several clients  
+-----------------------------------------------
 
 Now that you have an understanding of the main components of FEDn, you can use the provided docker-compose templates to automate deployment of FEDn and clients. 
 To start the network and attach 4 clients: 
@@ -124,7 +124,7 @@ To start the network and attach 4 clients:
 
 
 Access logs and validation data from MongoDB  
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+---------------------------------------------
 You can access and download event logs and validation data via the API, and you can also as a developer obtain 
 the MongoDB backend data using pymongo or via the MongoExpress interface: 
 
@@ -133,7 +133,7 @@ the MongoDB backend data using pymongo or via the MongoExpress interface:
 The credentials are as set in docker-compose.yaml in the root of the repository. 
 
 Access model updates  
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+---------------------
 
 You can obtain model updates from the 'fedn-models' bucket in Minio: