fix(adev): 原版中错误的注释

(cherry picked from commit 37f3aa3)

Author: asnowwolf

packages/core/src/linker/component_factory.ts

@@ -98,7 +98,7 @@ export abstract class ComponentFactory<C> {
    */
   abstract get componentType(): Type<any>;
   /**
-   * Selector for all <ng-content> elements in the component.
+   * Selector for all &lt;ng-content&gt; elements in the component.
    */
   abstract get ngContentSelectors(): string[];
   /**

packages/core/src/render3/component.ts

@@ -127,7 +127,7 @@ export interface ComponentMirror<C> {
    */
   get outputs(): ReadonlyArray<{readonly propName: string; readonly templateName: string}>;
   /**
-   * Selector for all <ng-content> elements in the component.
+   * Selector for all &lt;ng-content&gt; elements in the component.
    */
   get ngContentSelectors(): ReadonlyArray<string>;
   /**