docs: update URLs from stainlessapi.com to stainless.com (#3959)

stainless-app[bot] · stainless-app[bot] · commit b49e2a92b507 · 2025-03-13T00:22:19.000Z
More details at https://www.stainless.com/changelog/stainless-com
diff --git a/SECURITY.md b/SECURITY.md
@@ -1 +1,3 @@
-Please see [this page](https://www.cloudflare.com/.well-known/security.txt) for information on how to report a vulnerability to Cloudflare. Thanks!
+# Reporting Security Vulnerabilities
+
+Please see [this page](https://www.cloudflare.com/.well-known/security.txt) for information on how to report a vulnerability to Cloudflare. Thanks!
