remove displayed "```csharp" in Unsafe Type Creation code example

[McP4nth3r]

removes wrong displayed ```csharp in Unsafe Type Creation code example

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.46%. Comparing base (a730ab0) to head (9052d17).

❗ Current head 9052d17 differs from pull request most recent head b5471c7

Please upload reports for the commit b5471c7 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7138      +/-   ##
==========================================
- Coverage   75.01%   72.46%   -2.56%     
==========================================
  Files        2622     2625       +3     
  Lines      131763   131689      -74     
==========================================
- Hits        98845    95424    -3421     
- Misses      32918    36265    +3347     

Flag	Coverage Δ
unittests	72.46% <ø> (-2.56%)	⬇️

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[michaelstaib]

Thank you for your contribution.

[michaelstaib]

Can you sign the CLA so we can merge this change?

[McP4nth3r]

Can you sign the CLA so we can merge this change?

its signed sry ive forget it ;)