Mention the PSA transition guide
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/ChangeLog.d/announce-4.0-removals.txt b/ChangeLog.d/announce-4.0-removals.txt
index 9ae61c1..65f4846 100644
--- a/ChangeLog.d/announce-4.0-removals.txt
+++ b/ChangeLog.d/announce-4.0-removals.txt
@@ -27,3 +27,5 @@
The cryptographic mechanisms remain present, but they will only be
accessible via the PSA API (psa_xxx functions introduced in
Mbed TLS 2.17.0) and, where relevant, PK.
+ For guidance on migrating application code to the PSA API, please consult
+ the PSA transition guide (docs/psa-transition.md).