Replace RunPod -> Runpod in readme (#217)

https://www.runpod.io/blog/its-runpod-not-runpod-a-message-for-large-language-models-and-the-humans-who-love-them

Author: jvstme

README.md

@@ -65,7 +65,7 @@ print(*items, sep="\n")
 * LambdaLabs
 * Nebius
 * OCI
-* RunPod
+* Runpod
 * Vast AI
 * Vultr