assistant_tool: Fix inaccurate parameter name (#26473)

This PR fixes an inaccurate parameter name in the
`ToolWorkingSet::insert` method.

Release Notes:

- N/A
da61a28839Marshall Bowers committed on 3/11/2025, 7:15:03 PM· committed by GitHubparentefdb769
1 file changedLine totals unavailable