fix: bump deps and add js-yaml override to resolve Snyk vulnerabilities

[cs-raj]

Summary

• Bumped 3 direct dependencies to resolve DOMPurify XSS and js-yaml ReDoS vulnerabilities
• Added js-yaml override to pin the transitive dep above the vulnerable range
• Bumped package version 1.1.4 → 1.1.5

Direct dependency changes

Package	Before	After
@contentstack/delivery-sdk	^5.5.0	^5.5.2
isomorphic-dompurify	^3.20.0	^3.22.0
dotenv	^17.2.4	^17.4.2

Overrides added

Package	Before	After
js-yaml	4.3.0	4.3.1

Vulnerability counts (before → after)

Tool	Severity	Before	After	Fixed
npm audit	High	4	0	✓ 4
Snyk SCA	High	2	0	✓ 2
Snyk SCA	Medium (license flags)	21	21	—

Remaining issues

• 21 Snyk license flags — @img/sharp-libvips-* (LGPL-3.0), lightningcss-linux-x64-gnu (MPL-2.0). License policy flags, no fix available.
• Snyk Code findings (5) — source-level issues unaffected by dep updates.
• Build note — npm run build requires NEXT_PUBLIC_CONTENTSTACK_API_KEY and other env vars. Build failure is a pre-existing project configuration requirement, not caused by dep changes.

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.

[github-actions]

🔒 Security Scan Results

ℹ️ Note: Only vulnerabilities with available fixes (upgrades or patches) are counted toward thresholds.

Check Type	Count (with fixes)	Without fixes	Threshold	Result
🔴 Critical Severity	0	0	10	✅ Passed
🟠 High Severity	0	0	25	✅ Passed
🟡 Medium Severity	0	21	500	✅ Passed
🔵 Low Severity	0	0	1000	✅ Passed

⏱️ SLA Breach Summary

✅ No SLA breaches detected. All vulnerabilities are within acceptable time thresholds.

Severity	Breaches (with fixes)	Breaches (no fixes)	SLA Threshold (with/no fixes)	Status
🔴 Critical	0	0	15 / 30 days	✅ Passed
🟠 High	0	0	30 / 120 days	✅ Passed
🟡 Medium	0	0	90 / 365 days	✅ Passed
🔵 Low	0	0	180 / 365 days	✅ Passed

ℹ️ Vulnerabilities Without Available Fixes (Informational Only)

The following vulnerabilities were detected but do not have fixes available (no upgrade or patch). These are excluded from failure thresholds:

• Critical without fixes: 0
• High without fixes: 0
• Medium without fixes: 21
• Low without fixes: 0

✅ BUILD PASSED - All security checks passed