Fix path usage with LiteralPath where appropriate

[amis92]

Issue

The on-release indexing action fails for ZZ - Chaos - Warriors of Chaos (Warscroll Compendium) [2017].cat and it's the only catalogue with a square bracket [...] in it's name.

Explainer

This is a glob pattern in ubuntu, and I didn't take that into account in the PowerShell (I should use -LiteralPath for Test-Path et al.).

https://github.com/BSData/publish-catpkg/blob/v1/src/BsdataCatpkg/BsdataCatpkg.psm1#L138-L141

https://github.com/BSData/warhammer-age-of-sigmar/runs/3053119972?check_suite_focus=true#step:3:168