Changelog entry for v16.8

Author: smuehlst

CHANGELOG.md

@@ -1,9 +1,11 @@
 # Release History
 
-## Next release
+## [v16.8](https://github.com/smuehlst/circle-stdlib/releases/tag/v16.8)
 
 * Fixed issue #45: The Circle library was not built in parallel mode if the top-level make 
 was invoked with `-j`.
+* Synced with [Circle Step 49.0.1](https://github.com/rsta2/circle/releases/tag/Step49.0.1).
+* Update Mbed TLS to [release v2.28.10](https://github.com/Mbed-TLS/mbedtls/releases/tag/mbedtls-2.28.10).
 
 ## [v16.7](https://github.com/smuehlst/circle-stdlib/releases/tag/v16.7)