docs: update sdk-variables minimum versions and remove inaccurate suggestion

Co-Authored-By: [email protected] <[email protected]>

Author: devin-ai-integration[bot]

fern/products/api-def/openapi-pages/extensions/sdk-variables.mdx

@@ -160,10 +160,10 @@ SDK variables are ideal for:
 
 SDK variables are supported in the following Fern SDK generators:
 
-- TypeScript (v3.13.0+)
-- Python (v4.32.1+)
-- Java (v3.10.1+)
+- TypeScript (v2.6.3+)
+- Python (v4.24.0+)
+- Java (v3.6.3+)
 
 <Note>
-  SDK variables only support string types. If you need more complex types, consider using global headers with `x-fern-global-headers` instead.
+  SDK variables only support string types.
 </Note>