message: Update performance table to correct markdown format
  Updated performance table to correct markdown format which is shown at the official tensorflow api documents
diff: @@ -62,13 +62,14 @@ BASE_DOCSTRING = """Instantiates the {name} architecture.
  ------------------------------------------------------------------------
  MACs stands for Multiply Adds
  - |Classification Checkpoint|MACs(M)|Parameters(M)|Top1 Accuracy|Pixel1|CPU(ms)|
  - | [mobilenet_v3_large_1.0_224] | 217 | 5.4 | 75.6 | 51.2 |
  - | [mobilenet_v3_large_0.75_224] | 155 | 4.0 | 73.3 | 39.8 |
  - | [mobilenet_v3_large_minimalistic_1.0_224] | 209 | 3.9 | 72.3 | 44.1 |
  - | [mobilenet_v3_small_1.0_224] | 66 | 2.9 | 68.1 | 15.8 |
  - | [mobilenet_v3_small_0.75_224] | 44 | 2.4 | 65.4 | 12.8 |
  - | [mobilenet_v3_small_minimalistic_1.0_224] | 65 | 2.0 | 61.9 | 12.2 |
  + |Classification Checkpoint|MACs(M)|Parameters(M)|Top1 Accuracy|Pixel1 CPU(ms)|
  + |---|---|---|---|---|
  + | mobilenet_v3_large_1.0_224 | 217 | 5.4 | 75.6 | 51.2 |
  + | mobilenet_v3_large_0.75_224 | 155 | 4.0 | 73.3 | 39.8 |
  + | mobilenet_v3_large_minimalistic_1.0_224 | 209 | 3.9 | 72.3 | 44.1 |
  + | mobilenet_v3_small_1.0_224 | 66 | 2.9 | 68.1 | 15.8 |
  + | mobilenet_v3_small_0.75_224 | 44 | 2.4 | 65.4 | 12.8 |
  + | mobilenet_v3_small_minimalistic_1.0_224 | 65 | 2.0 | 61.9 | 12.2 |
  The weights for all 6 models are obtained and translated from the Tensorflow
  checkpoints from TensorFlow checkpoints found [here]
  