[V4.2.1] Update version info to V4.2.1

FreeRTOS / FreeRTOS-Plus-TCP

FreeRTOS-Plus-TCP library repository. +TCP files only. Submoduled into https://github.com/FreeRTOS/FreeRTOS and various other repos.

MIT License

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Closed tony-josi-aws closed 3 months ago

tony-josi-aws commented 3 months ago

This PR updates version info to V4.2.1

[ ] ~I have tested my changes. No regression in existing tests.~
[ ] ~I have modified and/or added unit-tests to cover the code changes in this Pull Request.~

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