Add changelog entry for the unchecked mbedtls_md call
mbed TLS ChangeLog (Sorted per branch, date)
+= mbed TLS x.x.x branch released xxxx-xx-xx
+
+Bugfix
+ * Fix an unchecked call to mbedtls_md() in the x509write module.
+
= mbed TLS 2.20.0 branch released 2020-01-15
Bugfix
