[Doc]: Connect-AzAccount Parameter Sets Cannot Describe the Functions and Usages Properly

### Type of issue

Other (describe below)

### Feedback

Currently the parameter sets of Connect-AzAccount don't describe the usages and functions

For example
- In the default parameter set "UserWithSubscriptionId (Default)", `subscription` is optional and so why it is named as "WithSubscriptionId"? Further, `UserWithCredential` is also a user flow and with `subscription` .
- For the parameter sets `ServicePrincipalWithSubscriptionId`, `ServicePrincipalCertificateWithSubscriptionId`, `ServicePrincipalCertificateFileWithSubscriptionId` and `AccessTokenWithSubscriptionId`, what's the meaning for "WithSubscriptionId" as the "subscripiton" is optional for all the parameter sets?

### Page URL

_No response_

### Content source URL

https://github.com/Azure/azure-powershell/blob/main/src/Accounts/Accounts/help/Connect-AzAccount.md

### Author

_No response_

### Document Id

_No response_