Bump third_party/openthread/repo from `287dbfa` to `2868c9c` #329

	name: "Validate Gradle Wrapper"
	on:
	push:
	branches:
	- master
	- 'v*-branch'
	pull_request:

	jobs:
	validation:
	name: "Validation"
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: Wandalen/[email protected]
	name: Gradle Validation
	continue-on-error: true
	with:
	action: gradle/wrapper-validation-action@v1
	attempt_limit: 3
	attempt_delay: 2000

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