TraceViewerContribution: Fix this error assignment

As previously flagged by SonarLint locally.

Signed-off-by: Marco Miller <marco.miller@ericsson.com>

theia-extensions/viewer-prototype/src/browser/trace-viewer/trace-viewer-contribution.ts

@@ -272,7 +272,7 @@ export class TraceViewerContribution extends WidgetOpenHandler<TraceViewerWidget
                 }
                 error = new Error('Unsuccessful health check: ' + healthResponse.getStatusMessage() + ' status: ' + healthResponse.getModel()?.status);
             } catch (err) {
-                error = error;
+                error = err;
             }
             if (timeout) {
                 throw error;