test: update renderSidebar regex to match 3-parameter signature
The test regexes matched `renderSidebar(\w+,\s*\w+)` (exactly 2 params)
but the fix in 821c595 added a third `currentRemoteId` parameter.
Updated to use `\(.*?\)` which matches any parameter count.
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Co-Authored-By: Amplifier <240397093+microsoft-amplifier@users.noreply.github.com>
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