docs(core): fix extra pound in inline doc (aws#23466)

`Stack.exportSrtringListValue` function inline doc have an extra pound messing up with jsii-docgen generated doc for classes extending Stack. See aws#23465 for more detail.s

----

### All Submissions:

* [x] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md)

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

packages/@aws-cdk/core/lib/stack.ts

@@ -1168,7 +1168,7 @@ export class Stack extends Construct implements ITaggable {
    * remove the reference from the consuming stack. After that, you can remove
    * the resource and the manual export.
    *
-   * # See `exportValue` for an example of this process.
+   * See `exportValue` for an example of this process.
    */
   public exportStringListValue(exportedValue: any, options: ExportValueOptions = {}): string[] {
     if (options.name) {