IAR context switch file was added for cortex-M33 in PR #5105

Author: deepikabhavnani

docs/reference/contributing/target/rtos.md

@@ -70,5 +70,6 @@ Filename | Description |
 `svc_user.c` | Removed as its template file and should not be in our code base |
 `rt_OsEventObserver.{c,h}` | Added an interface for uVisor to be notified about certain events from privileged code |
 `irq_armv8mbl.S` | IAR toolchain: added file for Cortex M23 core |
+`irq_armv8mml.S` | IAR toolchain: added file for Cortex M33 core |
 
 <span class="notes">**Note:** For all toolchains, Mbed OS uses `irq_cm0.s` for both M0 and M0P cores.</span>