Fixed incorrect span size variable in Ulid.New random source initialization.

[Seramis]

Related Issues

• Fixes Issue with Ulid.New() in ByteAether 1.3.3 (Regression from 1.3.2) #30

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Other (please specify):

Checklist

• The PR is submitted to the correct branch (main).
• My code follows the project's coding style. (.editorconfig)
• I have commented my code, particularly in hard-to-understand areas and public interfaces.
• I have added or updated tests for the changes I made.
• All new and existing tests passed.
• I have updated the documentation where applicable.

Testing Instructions

1. Create Blazor WASM project.
2. Inside a razor component, generate tens of thousands of ULIDs in default configuration and create a string (.ToString()) from each.
3. Run Blazor project in "Release" configuration.
4. Randomly exception appears. Might need multiple refreshes of the page.