refactor: use optional chaining in template validator

[thebedigupta]

Description
In this PR I worked on this issue
captured test results test-results.md

Resolved

• Slightly improving readability
• Following modern JavaScript best practices

[changeset-bot]

⚠️ No Changeset found

Latest commit: e0b7a7c

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[Gmin2]

LGTM

[derberg]

/rtm