Update hello_search_attributes.py with new typed search attribute syntax

[irdbl]

Old example used deprecated syntax

What was changed

Update hello_search_attributes.py with new typed search attribute syntax

Why?

Old example used deprecated syntax

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

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[cretz]

Thanks! Left a comment. May also need to sign the CLA.

[cretz]

May need to run poe format and confirm ok with poe lint.