Create a changelog entry

Signed-off-by: Anton Matkin <anton.matkin@arm.com>
diff --git a/ChangeLog.d/9322.txt b/ChangeLog.d/9322.txt
new file mode 100644
index 0000000..582e47f
--- /dev/null
+++ b/ChangeLog.d/9322.txt
@@ -0,0 +1,3 @@
+Changes
+   * Use the new `psa_pake_get_shared_key()` function implemented in
+     tf-psa-crypto instead of the removed `psa_pake_get_implicit_key()`