docs: renew TestMu AI sponsor (#1136)

(cherry picked from commit a20ff72)

Author: metcoder95

README.md

@@ -995,6 +995,12 @@ Piscina development was initially sponsored by [NearForm Research][].
 
 Looking to support the development of Piscina? Consider sponsoring us on [Open Collective](https://opencollective.com/piscinajs). We appreciate all levels of support!
 
+### Bronze Sponsors
+
+<a href="https://testmu.ai/?utm_source=piscinajs&utm_medium=sponsor" target="_blank">
+<img src="https://assets.testmu.ai/resources/images/logos/black-logo.png" style="vertical-align: middle;" width="250" height="115" />
+</a>
+
 ## Resources
 
 [`Atomics`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Atomics

docs/docs/Introduction.md

@@ -31,3 +31,10 @@ With worker threads now a well-established feature in Node.js, Piscina aims to b
 ## Sponsors
 
 Looking to support the development of Piscina? Consider sponsoring us on [Open Collective](https://opencollective.com/piscinajs). We appreciate all levels of support!
+
+### Bronze Sponsors
+
+<a href="https://testmu.ai/?utm_source=piscinajs&utm_medium=sponsor" target="_blank" rel="noopener noreferrer">
+<img src="https://assets.testmu.ai/resources/images/logos/black-logo.png" alt="TestMu.ai logo" style={{ verticalAlign: "middle" }} width="250" height="110" className="img-dark"/>
+<img src="https://assets.testmu.ai/resources/images/logos/white-logo.png" alt="TestMu.ai logo" style={{ verticalAlign: "middle" }} width="250" height="110" className="img-light"/>
+</a>