change order of optimizers

Author: jmitrevs

hls4ml/model/optimizer/__init__.py

@@ -59,7 +59,6 @@
     'convert',
     [
         'channels_last_converter',
-        'merge_linear_activation',
         'seperable_to_depthwise_and_conv',
         'remove_transpose_before_flatten',
         'remove_nop_transpose',
@@ -74,6 +73,7 @@
         'replace_multidimensional_dense_with_conv',
         'enforce_proxy_model_embedded_config',
         'eliminate_linear_activation',
+        'merge_linear_activation',
         # many of the above optimzers need to be done before this
         'infer_precision_types',
     ],