chore: add credits mention to readme

[5ZYSZ3K]

Add credits section to the readme

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.65%. Comparing base (b829513) to head (0fad553).

Additional details and impacted files

@@ Coverage Diff @@## main #43 +/- ##
=======================================
Coverage 98.65% 98.65% =======================================
Files 140 140 Lines 2085 2085 Branches 632 636 +4 =======================================
Hits 2057 2057 Misses 27 27 Partials 1 1 

Flag	Coverage Δ
css-processor	100.00% <ø> (ø)
render	97.85% <ø> (ø)
transient-render-engine	98.95% <ø> (ø)

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