Improper example for the wallet rpc call 'importwallet'

For the wallet rpc call [`importwallet` it gives the example of the directory path](https://hsd-dev.org/api-docs/?shell--curl#importwallet) `file='/home/home/user/WalletDump'`. [But the `dumpwallet` call](https://hsd-dev.org/api-docs/?shell--curl#dumpwallet) dumps the wallet info to a specific file of `path='/home/user-1/secretfiles/dump1.txt'`. The `importwallet` call needs to pass the dump file in order to work.

Start with the linked importwallet and dumpwallet API documentation examples. Update the importwallet example so it passes the dump file path produced by dumpwallet, then verify the two examples describe a consistent workflow.

Written by the indexing model from the issue text.