correcting tutorial for Result.tryCreate

[m-rinaldi]

Proposed Changes

• Corrected some mistakes in the tutorial for Result.tryCreate to make it easier to follow.
• Fixed the sample script related to Result.tryCreate.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• Build and tests pass locally
• I have added tests that prove my fix is effective or that my feature works (if appropriate)
• I have added necessary documentation (if appropriate)

[TheAngryByrd]

Thanks!