correct the syntax for the template

[shepp-bolt]

Description

was using ${ instead of {{ because gemini lied to me.
mustache syntax is the right way from the snyk docs

Testing

next time synk makes a pr in this repo we will see

Security Review

• I have considered and reviewed security implications of this PR and included the summary below.

Security Impact Summary

N/A

[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

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