Fix FUNRUN_CODE_CACHE_SIZE knob (#37756)

GitOrigin-RevId: 0ea70891a95141dc6986b04d489f7d524bfb0ee2

Author: goffrie

crates/common/src/knobs.rs

@@ -937,7 +937,7 @@ pub static FUNRUN_MODULE_MAX_CONCURRENCY: LazyLock<usize> =
 
 /// The maximum size of the module code cache in Funrun in bytes.
 pub static FUNRUN_CODE_CACHE_SIZE: LazyLock<u64> =
-    LazyLock::new(|| env_config("FUNRUN_MODULE_CACHE_SIZE", 500_000_000));
+    LazyLock::new(|| env_config("FUNRUN_CODE_CACHE_SIZE", 500_000_000));
 
 /// The maximum number of fetch clients Funrun would create.
 pub static FUNRUN_FETCH_CLIENT_CACHE_SIZE: LazyLock<usize> =