build: Grant Preview GitHub Action permission to write to issues and PRs

[vorburger]

No description provided.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	1		0	0.02s
✅ COPYPASTE	jscpd	yes		no	1.68s
✅ EDITORCONFIG	editorconfig-checker	1		0	0.01s
✅ REPOSITORY	checkov	yes		no	13.32s
✅ REPOSITORY	gitleaks	yes		no	0.17s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	grype	yes		no	11.25s
✅ REPOSITORY	secretlint	yes		no	0.86s
✅ REPOSITORY	trivy	yes		no	4.66s
✅ REPOSITORY	trivy-sbom	yes		no	1.33s
✅ REPOSITORY	trufflehog	yes		no	3.51s
✅ YAML	prettier	1	0	0	0.57s
✅ YAML	v8r	1		0	2.16s
✅ YAML	yamllint	1		0	0.25s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

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