chore(comments): correct spelling (#4142)

Thanks for this awesome library!

While investigating #4133 , I noticed a few typos in the comments. This PR corrects them.

No behaviour changes are introduced.

Two of the three comments are in exposed TS doc comments in `@jsii/kernel`. Let me know if you'd prefer a different commit type for those.

---

By submitting this pull request, I confirm that my contribution is made under the terms of the [Apache 2.0 license].

[Apache 2.0 license]: https://www.apache.org/licenses/LICENSE-2.0

packages/@jsii/kernel/src/api.ts

@@ -133,7 +133,7 @@ export interface CreateRequest {
   /**
    * The FQNs of interfaces the instance implements, if any. Declaring
    * interfaces that the class denoted by `fqn` implements is not necessary.
-   * This means that memebers of interfaces found in this property should
+   * This means that members of interfaces found in this property should
    * declare members that are found in the `overrides` property.
    */
   readonly interfaces?: string[];

packages/@jsii/kernel/src/link.ts

@@ -6,7 +6,7 @@ import { join } from 'path';
  * copy otherwise.
  *
  * @param existing    is the original file or directory to link.
- * @param destination is the nbew file or directory to create.
+ * @param destination is the new file or directory to create.
  */
 export function link(existing: string, destination: string): void {
   const stat = statSync(existing);

packages/@jsii/runtime/lib/host.ts

@@ -46,7 +46,7 @@ export class KernelHost {
 
   private callbackHandler(callback: api.Callback) {
     // write a "callback" response, which is a special response that tells
-    // the client that there's synchonous callback it needs to invoke and
+    // the client that there's synchronous callback it needs to invoke and
     // bring back the result via a "complete" request.
     this.inout.write({ callback });