docs: update sponsor banner [no ci]

Author: Cubxity

README.md

@@ -63,7 +63,7 @@ Read the [wiki](https://docs.cubxity.dev/docs/unifiedmetrics/intro) for instruct
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-[![Bloom logo](https://billing.bloom.host/templates/lagom/assets/img/logo/logo_big_inverse.svg)](https://billing.bloom.host/aff.php?aff=9)
+[![Bloom logo](https://bloom.host/banner.gif)](https://billing.bloom.host/aff.php?aff=9)
 
 YourKit supports open source projects with innovative and intelligent tools for monitoring and profiling Java and .NET
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