Fix issue with EXTENDS using private repository by sending GITHUB_TOKEN as HTTP auth header

[nvuillam]

Fixes #3400

Co-authored-by: Bheem 144472943+bheemvennapureddy@users.noreply.github.com

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ BASH	bash-exec	5		0	0.01s
✅ BASH	shellcheck	5		0	0.13s
✅ BASH	shfmt	5	0	0	0.59s
✅ COPYPASTE	jscpd	yes		no	4.2s
✅ DOCKERFILE	hadolint	127		0	15.94s
✅ JSON	eslint-plugin-jsonc	21	0	0	4.84s
✅ JSON	jsonlint	19		0	0.29s
✅ JSON	v8r	21		0	25.81s
✅ MAKEFILE	checkmake	1		0	0.0s
⚠️ MARKDOWN	markdownlint	261	0	265	31.49s
✅ MARKDOWN	markdown-link-check	261		0	10.7s
✅ MARKDOWN	markdown-table-formatter	261	0	0	143.46s
✅ OPENAPI	spectral	1		0	1.44s
⚠️ PYTHON	bandit	208		64	3.11s
✅ PYTHON	black	208	0	0	5.7s
✅ PYTHON	flake8	208		0	1.57s
✅ PYTHON	isort	208	0	0	1.42s
✅ PYTHON	mypy	208		0	17.88s
✅ PYTHON	pylint	208		0	16.74s
⚠️ PYTHON	pyright	208		353	27.02s
✅ PYTHON	ruff	208	0	0	0.63s
✅ REPOSITORY	checkov	yes		no	41.79s
✅ REPOSITORY	git_diff	yes		no	0.56s
⚠️ REPOSITORY	grype	yes		1	23.13s
✅ REPOSITORY	secretlint	yes		no	17.91s
✅ REPOSITORY	trivy	yes		no	28.23s
✅ REPOSITORY	trivy-sbom	yes		no	11.53s
⚠️ REPOSITORY	trufflehog	yes		1	13.76s
✅ SPELL	cspell	683		0	28.17s
✅ SPELL	lychee	341		0	24.31s
✅ XML	xmllint	3	0	0	0.65s
✅ YAML	prettier	160	0	0	5.83s
✅ YAML	v8r	102		0	180.64s
✅ YAML	yamllint	161		0	2.32s

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