chore: type import path correction

Author: DennisSmolek

packages/fiber/types/index.ts

@@ -17,7 +17,7 @@ export * from './renderTarget'
 // Side-effect imports for module augmentations
 import './three'
 import './tsl'
-import './postprocessing'
+import './renderPipeline'
 import './frameNext'
 
 // Note: webgpu types are exported separately via the /webgpu entry point