[BUG]: `group_description` in `github_team_sync_group_mapping` constantly recreated on change

### Expected Behavior

When a `group_description` is changed in IdPs (for example Azure Entra), the change in `github_team_sync_group_mapping` should persist on applying Terraform.

### Actual Behavior

When a `group_description` is changed in IdPs (for example Azure Entra), terraform see the change and try to update the `group` block in `github_team_sync_group_mapping`. However the change with the new `group_description` does not persist. During next runs, terraform still shows the difference and constantly will try to update.

This could be related on how GitHub API handles updates to `Identity Provider Groups`. Some observation on similarity in GitHub GUI that might be relevant:
- Change description of Azure Entra group which is connected to GitHub team.
- Go to GitHub team setting `Identity Provider Groups`. Entra group will have the old description. If we try to remove the Entra group and add it again, the Entra group description will be updated, but the changes to the group description are not saved on pressing save. The group should be removed, saved and then added again to reflect the change to the description.

### Terraform Version

Terraform 1.9.7
integrations/github v5.45.0

### Affected Resource(s)

- github_team_sync_group_mapping

### Terraform Configuration Files

_No response_

### Steps to Reproduce

_No response_

### Debug Output

_No response_

### Panic Output

_No response_

### Code of Conduct

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