Misspelled/Errors neptune snapshot

[chammock]

First off, the resource NetpuneSnapshot is misspelled and should be NeptuneSnapshot.

Second, I got an error while trying to remove an automated Neptune snapshot. The error occurs because the NeptuneSnapshot resource is not filtering out automated snapshots, which cannot be deleted.

The following is the printout from a nuke run. The test-manual snapshot is expected to be removed as it is a manual snapshot but the rds:database-1-2021-11-01-16-16 should be filtered out as it's automated.

> aws-nuke -c nuke.yml --no-dry-run
aws-nuke version v2.16.0 - Mon Sep  6 14:29:17 UTC 2021 - 048c4bb92e38f8a119fb5d988f548cc622fb1b26

Do you really want to nuke the account with the ID xxxxxxxxxxxx and the alias 'xxxxxx'?
Do you want to continue? Enter account alias to continue.
> xxxxxx

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - would remove
us-east-1 - NetpuneSnapshot - test-manual - would remove
Scan complete: 2 total, 2 nukeable, 0 filtered.

Do you really want to nuke these resources on the account with the ID xxxxxxxxxxxx and the alias 'xxxxxx'?
Do you want to continue? Enter account alias to continue.
> xxxxxx

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - failed
us-east-1 - NetpuneSnapshot - test-manual - triggered remove

Removal requested: 1 waiting, 1 failed, 0 skipped, 0 finished

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - failed
us-east-1 - NetpuneSnapshot - test-manual - waiting

Removal requested: 1 waiting, 1 failed, 0 skipped, 0 finished

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - failed
us-east-1 - NetpuneSnapshot - test-manual - removed

Removal requested: 0 waiting, 1 failed, 0 skipped, 1 finished

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - failed

Removal requested: 0 waiting, 1 failed, 0 skipped, 1 finished

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - failed

Removal requested: 0 waiting, 1 failed, 0 skipped, 1 finished

time="2021-11-01T11:17:28-05:00" level=error msg="There are resources in failed state, but none are ready for deletion, anymore."

us-east-1 - NetpuneSnapshot - rds:database-1-2021-11-01-16-16 - failed
time="2021-11-01T11:17:28-05:00" level=error msg="InvalidDBClusterSnapshotStateFault: Only manual snapshots may be deleted.\n\tstatus code: 400, request id: 8079e6f6-d461-4b96-a682"
Error: failed