Add changelog entry for new PSA PAKE feature

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/ChangeLog.d/psa_crypto_pake.txt b/ChangeLog.d/psa_crypto_pake.txt
new file mode 100644
index 0000000..27e3b5c
--- /dev/null
+++ b/ChangeLog.d/psa_crypto_pake.txt
@@ -0,0 +1,2 @@
+Features
+    * Expose the EC J-PAKE functionality through the PSA PAKE Crypto API.