changelog: add note for MD changes

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/ChangeLog.d/9652.txt b/ChangeLog.d/9652.txt
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+++ b/ChangeLog.d/9652.txt
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+Features
+   * MD module can now perform PSA dispatching also when
+     `MBEDTLS_PSA_CRYPTO_CLIENT && !MBEDTLS_PSA_CRYPTO_C`, even though this
+     configuration is not officially supported. This requires that a
+     PSA Crypto provider library which:
+     * supports the required `PSA_WANT_ALG_xxx` and
+     * implements `psa_can_do_hash()` on the client interface
+     is linked against Mbed TLS and that `psa_crypto_init()` is called before
+     performing any PSA call.