Suggestion from review: move a comment from gc-tls.h into julia_threads.h

Co-authored-by: Kiran Pamnany <[email protected]>

Author: d-netto

src/julia_threads.h

@@ -148,7 +148,7 @@ typedef struct _jl_tls_states_t {
     int16_t disable_gc;
     // Counter to disable finalizer **on the current thread**
     int finalizers_inhibited;
-    jl_gc_tls_states_t gc_tls;
+    jl_gc_tls_states_t gc_tls; // this is very large, and the offset of the first member is baked into codegen
     volatile sig_atomic_t defer_signal;
     _Atomic(struct _jl_task_t*) current_task;
     struct _jl_task_t *next_task;