update --config description

src/agat/agat_convert_genscan2gff/config.vsh.yaml

@@ -69,7 +69,7 @@ argument_groups:
       - name: --config
         alternatives: [-c]
         description: |
-          Input agat config file. By default AGAT takes as input agat_config.yaml file from the working directory if any, otherwise it takes the original agat_config.yaml shipped with AGAT. To get the agat_config.yaml locally type: "agat config --expose". The --config option gives you the possibility to use your own AGAT config file (located elsewhere or named differently).
+          AGAT config file. By default AGAT takes the original agat_config.yaml shipped with AGAT. The --config option gives you the possibility to use your own AGAT config file (located elsewhere or named differently).        
         type: file
         required: false
         example: custom_agat_config.yaml