Update nuke to 8.1.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Nuke.Common (source)	8.1.1 -> 8.1.2
nuke.globaltool (source)	8.1.1 -> 8.1.2

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Release Notes

nuke-build/nuke (Nuke.Common)

v8.1.2

Compare Source

• Fixed exclusion of skipped target from lookup for skippable dependencies
• Fixed resolution of empty environment variables to false
• Fixed parallel execution to prefer logger from settings

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