doc: mpsl: Add information about changes in MPLS ZLI ISRs

Add information about changes in MPSL ISRs wrappers for MPSL
owned peripherals. The chagne was needed because ISRs were
violating kernels ZLI ISRs rules to do not invoke kernel APIs
and not trigger scheduler at end.

Signed-off-by: Piotr Pryga <[email protected]>

Author: ppryga-nordic

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -585,7 +585,18 @@ Modem libraries
 Multiprotocol Service Layer libraries
 -------------------------------------
 
-|no_changes_yet_note|
+  * Updated the implementation of the following interrupt service routine wrappers:
+
+    * :c:func:`mpsl_timer0_isr_wrapper`
+    * :c:func:`mpsl_rtc0_isr_wrapper`
+    * :c:func:`mpsl_radio_isr_wrapper`
+
+   Now, they do not trigger the kernel scheduler or use any kernel APIs.
+
+    .. note::
+
+       Invoking kernel APIs or triggering the kernel scheduler from Zero Latency Interrupts is considered undefined behavior.
+       Users of MPSL timeslots should not assume that thread rescheduling will occur automatically at the end of a timeslot.
 
 Libraries for networking
 ------------------------