Unable to assign tags to L2VPN terminations

### Deployment Type

Self-hosted

### NetBox Version

v3.6.6

### Python Version

3.10

### Steps to Reproduce

1. Create an L2VPN.
2. Add a termination to the L2VPN, selecting one or more tags to assign to it.

### Expected Behavior

The tags should be assigned to the newly created L2VPNTermination instance.

### Observed Behavior

The instance has no tags assigned.