Add changelog entry (PSA initialization in sample programs)

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/ChangeLog.d/programs_psa_fix.txt b/ChangeLog.d/programs_psa_fix.txt
new file mode 100644
index 0000000..fe2099e
--- /dev/null
+++ b/ChangeLog.d/programs_psa_fix.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * Fix missing PSA initialization in sample programs when
+     MBEDTLS_USE_PSA_CRYPTO is enabled.