Announce psa_can_do_cipher()

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/ChangeLog.d/psa_can_do_cipher.txt b/ChangeLog.d/psa_can_do_cipher.txt
new file mode 100644
index 0000000..16598b6
--- /dev/null
+++ b/ChangeLog.d/psa_can_do_cipher.txt
@@ -0,0 +1,5 @@
+API changes
+   * When building the library as a PSA client (MBEDTLS_PSA_CRYPTO_CLIENT
+     enabled and MBEDTLS_PSA_CRYPTO_C disabled), you need to provide the
+     function psa_can_do_cipher() in addition to psa_can_do_hash(). This
+     changed was made in Mbed TLS 3.6.0 but was not announced then.