Restored changelog entries

This commit restores all changelog entries between the
mbedtls-3.6.0 tag and the mbedtls-4.0.0-beta tag.

git diff ce4683e..09dc57d --name-status -- ChangeLog.d

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/ChangeLog.d/ecdsa-conversion-overflow.txt b/ChangeLog.d/ecdsa-conversion-overflow.txt
new file mode 100644
index 0000000..83b7f2f
--- /dev/null
+++ b/ChangeLog.d/ecdsa-conversion-overflow.txt
@@ -0,0 +1,6 @@
+Security
+   * Fix a stack buffer overflow in mbedtls_ecdsa_der_to_raw() and
+     mbedtls_ecdsa_raw_to_der() when the bits parameter is larger than the
+     largest supported curve. In some configurations with PSA disabled,
+     all values of bits are affected. This never happens in internal library
+     calls, but can affect applications that call these functions directly.