Add changelog entry for #4217

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
diff --git a/ChangeLog.d/add-missing-parenthesis.txt b/ChangeLog.d/add-missing-parenthesis.txt
new file mode 100644
index 0000000..ec01985
--- /dev/null
+++ b/ChangeLog.d/add-missing-parenthesis.txt
@@ -0,0 +1,4 @@
+Bugfix
+   * Add a parenthesis that was missing from ecp.c when
+     MBEDTLS_ECP_RANDOMIZE_MXZ_ALT is defined. Found and reported by
+     mbeniamino in #4217.