refactor(index)!: make `unrtfPath` and `unrtfVersion` fields private #814

Job	Run time
Dependency Review	4s
Lint Code	33s
Lint Commit Messages	11s
Unit Tests (18, macos-latest)	56s
Unit Tests (18, ubuntu-latest)	52s
Unit Tests (18, windows-latest)	1m 17s
Unit Tests (20, macos-latest)	1m 3s
Unit Tests (20, ubuntu-latest)	30s
Unit Tests (20, windows-latest)	1m 13s
Aggregate Coverage Calculations	4s
Save Dependabot PR Number	0s
	6m 43s

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