[mbed-tls] New Mbed TLS releases : 3.4.0 and 2.28.3

Hi Mbed TLS users,

Just to note that on Tuesday we released Mbed TLS versions 3.4.0 and 2.28.3. Apologies for not announcing this here - notifications were sent to the 'announce' mailing list, but not to here. Future release notifications will be sent to both.

These releases of Mbed TLS address several security issues, provide bug fixes, and bring other minor changes. Full details are available in the release notes. (https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.4.0, https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.3).

We recommend all users to consider whether they are impacted, and to upgrade appropriately.

The Mbed TLS team