Fix spelling for nuspec template

[FraserGreenroyd]

Fixes #374

[FraserGreenroyd]

@BHoMBot check compliance @BHoMBot check required

[bhombot-ci[bot]]

@FraserGreenroyd to confirm, the following actions are now queued: - check `code-compliance` - check `documentation-compliance` - check `project-compliance` - check `branch-compliance` - check `dataset-compliance` - check `copyright-compliance` - check `code-compliance` - check `documentation-compliance` - check `project-compliance` - check `core` - check `null-handling` - check `serialisation` - check `versioning` - check `installer` There are 36 requests in the queue ahead of you.

[FraserGreenroyd]

@BHoMBot check ready-to-merge

[bhombot-ci[bot]]

@FraserGreenroyd to confirm, the following actions are now queued: - check `ready-to-merge` There are 22 requests in the queue ahead of you.