Make DEPLOY_BRANCHES more restrictive

[clemfernandez]

Add start ^ and end $ token so that branches names are precisely matched

[github-actions[bot]]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	7		0	0.11s
✅ COPYPASTE	jscpd	yes		no	14.47s
✅ DOCKERFILE	hadolint	1		0	0.1s
✅ JSON	npm-package-json-lint	yes		no	0.56s
✅ JSON	prettier	11	0	0	1.53s
✅ JSON	v8r	11		0	22.75s
⚠️ MARKDOWN	markdownlint	148	0	705	31.85s
✅ MARKDOWN	markdown-table-formatter	148	0	0	1.62s
✅ REPOSITORY	checkov	yes		no	20.09s
⚠️ REPOSITORY	gitleaks	yes		2	12.76s
⚠️ REPOSITORY	grype	yes		1	18.0s
✅ REPOSITORY	trivy	yes		no	11.88s
✅ REPOSITORY	trivy-sbom	yes		no	2.84s
✅ REPOSITORY	trufflehog	yes		no	5.9s
✅ SPELL	cspell	338		0	19.41s
✅ SPELL	lychee	173		0	4.52s
✅ TYPESCRIPT	eslint	149	0	0	8.43s
✅ TYPESCRIPT	prettier	149	0	0	10.98s
✅ XML	xmllint	4	0	0	0.1s
✅ YAML	prettier	12	0	0	1.74s
✅ YAML	v8r	12		0	40.04s
✅ YAML	yamllint	12		0	0.75s

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