Merge branch 'docs-1.13-release-notes' into release/1.13.0

Author: DennisDyallo

docs/users-manual/getting-started/whats-new.md

@@ -16,6 +16,39 @@ limitations under the License. -->
 
 Here you can find all of the updates and release notes for published versions of the SDK.
 
+## 1.13.x Releases
+
+### 1.13.0
+
+Release date: April 9th, 2025
+
+Features:
+
+- Curve25519 support has been added for PIV [#210](https://github.com/Yubico/Yubico.NET.SDK/pull/210):
+ 
+   - Keys can now be imported or generated using the Ed25519 and X25519 algorithms. 
+   - The key agreement operation can be performed with an X25519 key.
+   - Digital signatures can now be created with a Ed25519 key.
+   - New related unit tests have been added.
+
+- Unit tests have been added for RSA-3072 and RSA-4096 keys [#197](https://github.com/Yubico/Yubico.NET.SDK/pull/197).
+
+- Support for large APDUs has been improved [#208](https://github.com/Yubico/Yubico.NET.SDK/pull/208):
+
+   - When sending large APDU commands to a YubiKey via the smartcard connection, the CommandChainingTransform will now throw an exception when the cumulative APDU data (sent in chunks of up to 255 bytes) exceeds the max APDU size for the given YubiKey (varies based on firmware version; see SmartCardMaxApduSizes).
+
+- Support for Ed25519 and P384 credentials has been added for FIDO [#186](https://github.com/Yubico/Yubico.NET.SDK/pull/186).
+
+- Ubuntu runners have been upgraded from version 20.04 to 22.04 to support the compilation of Yubico.NativeShims [#188](https://github.com/Yubico/Yubico.NET.SDK/pull/188).
+
+Bug Fixes:
+
+- The default logger now only writes output for the "Error" log level unless another level is specified [#185](https://github.com/Yubico/Yubico.NET.SDK/pull/185). Previously, the logger wrote output for all log levels, which could become overly long and difficult to evaluate.
+
+Miscellaneous: 
+
+- The [License](https://github.com/Yubico/Yubico.NET.SDK/blob/develop/LICENSE.txt) was updated to remove the information for the AesCmac.cs file from the Bouncy Castle library [#196](https://github.com/Yubico/Yubico.NET.SDK/pull/196).
+
 ## 1.12.x Releases
 
 ### 1.12.1