update search results onBufferContentsChange (#3811)

src/browser/decorations/BufferDecorationRenderer.ts

@@ -28,7 +28,7 @@ export class BufferDecorationRenderer extends Disposable {
     this._container.classList.add('xterm-decoration-container');
     this._screenElement.appendChild(this._container);
 
-    this.register(this._renderService.onRenderedBufferChange(() => this._queueRefresh()));
+    this.register(this._renderService.onRenderedViewportChange(() => this._queueRefresh()));
     this.register(this._renderService.onDimensionsChange(() => {
       this._dimensionsChanged = true;
       this._queueRefresh();

src/browser/decorations/OverviewRulerRenderer.ts

@@ -82,7 +82,7 @@ export class OverviewRulerRenderer extends Disposable {
    * and hide the canvas if the alt buffer is active
    */
   private _registerBufferChangeListeners(): void {
-    this.register(this._renderService.onRenderedBufferChange(() => this._queueRefresh()));
+    this.register(this._renderService.onRenderedViewportChange(() => this._queueRefresh()));
     this.register(this._bufferService.buffers.onBufferActivate(() => {
       this._canvas!.style.display = this._bufferService.buffer === this._bufferService.buffers.alt ? 'none' : 'block';
     }));