[Template] Fix Lightmap encoding in com.unity.template.hdrp-blank UUM-69993

[megh-jagad]

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Purpose of this PR

https://jira.unity3d.com/browse/UUM-69993
It fixes the Lightmap encoding settings popup that shows up in the hdrp blank template

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Testing status

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[LagueKristin]

Fabulous! Thank you