Documentation about the OTA update password could be more informative

**Describe the problem you have/What new integration you would like**

In the OTA section of the documentation there is a password mentioned, but this does not explain why I would want one set, and if I have an encryption key set for the API, would that not prevent me uploading an OTA image if I did not have the encryption key?

**Please describe your use case for this integration and alternatives you've tried:**

What is the function of the password, in what situations would it make sense to not have one?

**Additional context**

Start with the OTA section of the documentation mentioned in the issue and review how it describes the password and API encryption key. Done means explaining the password's purpose, when it is appropriate to omit one, and whether the encryption key affects OTA uploads.

Written by the indexing model from the issue text.