Fix silenced Style/OpenStructUse offenses
What does this MR do and why?
Fixes the silent offense of Style/OpenStructUse cop from:
app/finders/snippets_finder.rbMR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR. 
Related to #344279 (closed)
Edited  by Mehul Sharma