Firehose: interpolate the destination id in the not-found message

[Zuhef]

update_destination() reports an unknown destination id with a missing f prefix, so the caller gets the placeholder text rather than the id they passed:

>>> client.update_destination(
...     DeliveryStreamName="my-stream",
...     CurrentDeliveryStreamVersionId="1",
...     DestinationId="destinationId-000000000009",
...     ExtendedS3DestinationUpdate=s3_config,
... )
InvalidArgumentException: Destination Id {destination_id} not found

The raise immediately above it in the same method uses f-strings, and every other braced string in moto/firehose/models.py is an f-string, so this looks like a slip rather than an intentional literal.

Added the unknown-id case to test_update_destination, which previously only ever passed the id that exists. Without the one-character change it fails with:

assert 'Destination Id destinationId-000000000009 not found' in 'Destination Id {destination_id} not found'

tests/test_firehose passes (31), and ruff format is clean. ruff check moto/firehose tests/test_firehose reports the same 5 findings before and after my change, and the one mypy finding in this file (models.py:443) is also present on an unmodified checkout, so I have left both alone.

One thing I did not verify: the exact wording real Firehose uses for this error. I only changed the interpolation, not the text, so if AWS words it differently that is a separate question.