Added changelog

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
diff --git a/ChangeLog.d/add_export_public_key_driver.txt b/ChangeLog.d/add_export_public_key_driver.txt
new file mode 100644
index 0000000..a9bffbc
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+++ b/ChangeLog.d/add_export_public_key_driver.txt
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+Features
+    * Implementation of the export_public_key interface for PSA Crypto
+      accelerator drivers, as defined in #3493. Contributed in #3786.