Fix Pipeline syntax in fileExists examples

[MarkEWaite]

Fix Pipeline syntax errors in fileExists examples

Reported in documentation feedback sheet

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
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• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[Bananeweizen]

👍🏻
Can somebody with the necessary powers please merge this one? I was just going to raise a second PR to fix the "rersources" typos. :)