Added missing newline in changelog entry

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
diff --git a/ChangeLog.d/do_not_persist_volatile_external_keys.txt b/ChangeLog.d/do_not_persist_volatile_external_keys.txt
index c10b22c..b27292c 100644
--- a/ChangeLog.d/do_not_persist_volatile_external_keys.txt
+++ b/ChangeLog.d/do_not_persist_volatile_external_keys.txt
@@ -1,4 +1,4 @@
 Default behavior changes
    * Stop storing persistent information about externally stored keys created
      through PSA Crypto with a volatile lifetime. Reported in #3288 and
-     contributed by Steven Cooreman in #3382.
\ No newline at end of file
+     contributed by Steven Cooreman in #3382.