chore : update freertos release (V11.3.1)

[fpenard]

Summary of changes:

• Update FreeRTOS submodule to last official release (V11.3.1) - from V11.1.0

Summary by CodeRabbit

• Bug Fixes

  • Improved compatibility when building with C++, ensuring system timing information links correctly.

• Maintenance

  • Updated the included FreeRTOS component to a newer revision.

[fpenard]

Hello,
What is missing to accept this pull request ?

[coderabbitai]

📝 Walkthrough

Walkthrough

The FreeRTOS configuration adds C linkage for SystemCoreClock when compiled as C++, and the referenced FreeRTOS submodule commit is updated.

Changes

FreeRTOS updates

Layer / File(s)	Summary
C++ linkage for SystemCoreClock radio/src/FreeRTOSConfig.h	Conditionally wraps the SystemCoreClock declaration and <stdint.h> include in an extern "C" block for C++ compilation.
FreeRTOS submodule revision radio/src/thirdparty/FreeRTOS	Updates the referenced FreeRTOS submodule commit.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the main change: updating the FreeRTOS release to V11.3.1.
Description check	✅ Passed	The description includes a concise summary of the FreeRTOS submodule update from V11.1.0 to V11.3.1. The optional issue reference is not provided, but the description is otherwise sufficient.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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