update readme, remove plain-text password specification

Signed-off-by: Ivan P <2119240+i5okie@users.noreply.github.com>

Author: i5okie

charts/vc-authn-oidc/README.md

@@ -210,7 +210,6 @@ Note: Secure values of the configuration are passed via equivalent environment v
 | ------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------- |
 | `acapy.walletStorageCredentials.json`                        | Raw json with database credentials. Overrides all other values including postgres subchart values. e.g.: '{"account":"postgres","password":"mysecretpassword","admin_account":"postgres","admin_password":"mysecretpassword"}' | `""`                |
 | `acapy.walletStorageCredentials.account`                     | Database account name.                                                                                                                                                                                                         | `""`                |
-| `acapy.walletStorageCredentials.password`                    | Database password.                                                                                                                                                                                                             | `""`                |
 | `acapy.walletStorageCredentials.admin_account`               | Database account with CREATEDB role used to create additional databases per wallet.                                                                                                                                            | `postgres`          |
 | `acapy.walletStorageCredentials.admin_password`              | Database password for admin account.                                                                                                                                                                                           | `""`                |
 | `acapy.walletStorageCredentials.existingSecret`              | Name of an existing secret containing 'database-user', 'database-password', 'admin-password' keys.                                                                                                                             | `""`                |