Update recognition.py

[RishitSingh10]

Dense layer doesn't take weight initializations as argument.

[roguh]

For context, this is the output I get without this fix:

>>> pipeline = keras_ocr.pipeline.Pipeline()

Looking for /root/.keras-ocr/craft_mlt_25k.h5
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
[<ipython-input-6-6b85d751285a>](https://localhost:8080/#) in <cell line: 1>()
----> 1 pipeline = keras_ocr.pipeline.Pipeline(
...
ValueError: Unrecognized keyword arguments passed to Dense: {'weights': [array([[0., 0., 0., 0., 0., 0.], ...

The exception can be misleading since it prints out the weights array, but I truncated it here.