fix(search.sh): repair pacdeps updating

[oklopfer]

Purpose

because of

Approach

for pacdeps, the PACKAGE variable is already available, so just check if the pacdeps file exists for it, and keep the variable as that instead of overwriting with $i, which is pulled from the upgrade loop for parents.

Progress

• do it
• test it

Checklist

• I confirm that I have read the contributing guidelines, and this pull request is abiding by all the clauses stated in the guideline.