Merge remote-tracking branch 'origin/ak/compression_options' into ak/…

…compression_options

optimum/exporters/openvino/__main__.py

@@ -127,7 +127,7 @@ def main_export(
     """
     if compression_option is not None and compression_option != "f16" and not is_nncf_available():
         raise ImportError(
-            "Quantization of the weights to int8 requires nncf, please install it with `pip install nncf`"
+            f"Compression of the weights to {compression_option} requires nncf, please install it with `pip install nncf`"
         )
 
     model_kwargs = model_kwargs or {}