fix(cdk/tree): update API goldens

Author: BobobUnicorn

tools/public_api_guard/cdk/tree.md

@@ -90,7 +90,6 @@ export class CdkTree<T, K = T> implements AfterContentChecked, CollectionViewer,
     expansionKey?: (dataNode: T) => K;
     _getChildrenAccessor(): ((dataNode: T) => T[] | Observable<T[]> | null | undefined) | undefined;
     _getDirectChildren(dataNode: T): Observable<T[]>;
-    // (undocumented)
     _getLevel(node: T): number | undefined;
     _getLevelAccessor(): ((dataNode: T) => number) | undefined;
     _getNodeDef(data: T, i: number): CdkTreeNodeDef<T>;
@@ -122,7 +121,7 @@ export class CdkTree<T, K = T> implements AfterContentChecked, CollectionViewer,
         end: number;
     }>;
     // (undocumented)
-    static ɵcmp: i0.ɵɵComponentDeclaration<CdkTree<any, any>, "cdk-tree", ["cdkTree"], { "dataSource": { "alias": "dataSource"; "required": false; }; "treeControl": { "alias": "treeControl"; "required": false; }; "levelAccessor": { "alias": "levelAccessor"; "required": false; }; "childrenAccessor": { "alias": "childrenAccessor"; "required": false; }; "trackBy": { "alias": "trackBy"; "required": false; }; "expansionKey": { "alias": "expansionKey"; "required": false; }; }, {}, ["_nodeDefs"], never, false, never>;
+    static ɵcmp: i0.ɵɵComponentDeclaration<CdkTree<any, any>, "cdk-tree", ["cdkTree"], { "dataSource": { "alias": "dataSource"; "required": false; }; "treeControl": { "alias": "treeControl"; "required": false; }; "levelAccessor": { "alias": "levelAccessor"; "required": false; }; "childrenAccessor": { "alias": "childrenAccessor"; "required": false; }; "trackBy": { "alias": "trackBy"; "required": false; }; "expansionKey": { "alias": "expansionKey"; "required": false; }; "nodeType": { "alias": "nodeType"; "required": false; }; }, {}, ["_nodeDefs"], never, false, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkTree<any, any>, never>;
 }