changelog: updated description

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/ChangeLog.d/9302.txt b/ChangeLog.d/9302.txt
index f2389bf..6f56ece 100644
--- a/ChangeLog.d/9302.txt
+++ b/ChangeLog.d/9302.txt
@@ -1,8 +1,6 @@
 Features
-   * When the new compilation option MBEDTLS_PSA_STATIC_KEY_SLOTS is enabled,
-     key store uses statically allocated key slot's buffers instead of
-     dynamically allocating them on heap memory at runtime (through malloc/free
-     calls).
+   * Added new configuration option MBEDTLS_PSA_STATIC_KEY_SLOTS, which
+     uses static storage for keys, enabling malloc-less use of key slots.
      The size of each buffer is given by the option
      MBEDTLS_PSA_STATIC_KEY_SLOT_BUFFER_SIZE. By default it accomodates the
      largest PSA key enabled in the build.