correction infile to input in wildcard point

docs/ovf2vtk.ipynb

@@ -54,7 +54,7 @@
     "Usually, the number of files which should be converted is very large. In that case, a filename with a wildcard can be used.\n",
     "\n",
     "```\n",
-    "$ ovf2vtk --infile my-ovf-file*.omf\n",
+    "$ ovf2vtk --input my-ovf-file*.omf\n",
     "```"
    ]
   }