azure_rm_privatednsrecordset: fix updating SOA record

[akira6592]

SUMMARY

Similar to #1047, there was a conversion error in Private DNS Zone. So, fix type convert error in updating SOA record.

Note that host and serial_number cannot be updated. refer to https://github.com/MicrosoftDocs/azure-docs/issues/93705#issuecomment-1142728557

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

• azure_rm_privatednsrecordset

ADDITIONAL INFORMATION

integration test works fine in my local as bellow.

TASK [azure_rm_privatednsrecordset : Update SOA record] ************************
changed: [testhost] => {"changed": true, "state": {"etag": "xxx", "fqdn": "5537db84e886c87719744.com.", "id": "/subscriptions/xxx/resourceGroups/myrg/providers/Microsoft.Network/privateDnsZones/5537db84e886c87719744.com/SOA/@", "is_auto_registered": false, "name": "@", "soa_record": {"email": "azureprivatedns-host99.example.com", "expire_time": 2419299, "host": "azureprivatedns.net", "minimum_ttl": 399, "refresh_time": 3699, "retry_time": 399, "serial_number": 1}, "ttl": 3600, "type": "SOA"}}

[xuzhang3]

@akira6592 LGTM

[akira6592]

Thank you for the merge.