Merge branch 'dev' into dev2

Author: daanx

readme.md

@@ -88,7 +88,7 @@ Enjoy!
   Add `mi_options_print`, `mi_arenas_print`, and the experimental `mi_stat_get` and `mi_stat_get_json`. 
   Add `mi_thread_set_in_threadpool` and `mi_heap_set_numa_affinity` (v3 only). Add vcpkg portfile. 
   Upgrade mimalloc-redirect to v1.3.2. `MI_OPT_ARCH` is off by default now but still assumes armv8.1-a on arm64
-  for fast atomic operations.
+  for fast atomic operations. Add QNX support.
 * 2025-01-03, `v1.8.9`, `v2.1.9`, `v3.0.1-alpha`: Interim release. Support Windows arm64. New [guarded](#guarded) build that can place OS 
   guard pages behind objects to catch buffer overflows as they occur. 
   Many small fixes: build on Windows arm64, cygwin, riscV, and dragonfly; fix Windows static library initialization to account for