Update README.md

hpvm/test/dnn_benchmarks/keras/README.md

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 # Keras Benchmarks
 
-Instructions on using the Keras benchmarks and the Keras Frontend can be found [here](../../../docs/KerasFrontend.md): 
+Instructions on using the Keras benchmarks and the Keras Frontend can be found [**here**](../../../docs/KerasFrontend.md)