Update yarn-upgrade.yml (aws#20791)

In aws#19893, we added init-templates `package.json` files to our automatic upgrades mechanism. The packages `jest` and `ts-jest` were (not sure why...), added to the rejection list, i.e they specifically will not be upgraded; However, `@types/jest` was not added to this list, thereby creating a potential major version mismatch between them. 

This is exactly what happened here: aws#20751

This PR rejects upgrades to `@types/jest` as well, to keep them in sync.

----

### All Submissions:

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

### Adding new Unconventional Dependencies:

* [ ] This PR adds new unconventional dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md/#adding-new-unconventional-dependencies)

### New Features

* [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/main/INTEGRATION_TESTS.md)?
	* [ ] Did you use `yarn integ` to deploy the infrastructure and generate the snapshot (i.e. `yarn integ` without `--dry-run`)?

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

.github/workflows/yarn-upgrade.yml

@@ -67,7 +67,7 @@ jobs:
           lerna exec --parallel ncu -- --upgrade --reject='@types/node,@types/prettier,@types/fs-extra,constructs,typescript,aws-sdk,aws-sdk-mock,${{ steps.list-packages.outputs.list }}'  --target=minor
           # Upgrade package.jsons in init templates
           for pj in $(find packages/aws-cdk/lib/init-templates -name package.json); do
-            (cd $(dirname $pj) && ncu --upgrade --reject='@types/node,@types/prettier,@types/fs-extra,constructs,typescript,aws-sdk,aws-sdk-mock,ts-jest,jest,${{ steps.list-packages.outputs.list }}')
+            (cd $(dirname $pj) && ncu --upgrade --reject='@types/jest,@types/node,@types/prettier,@types/fs-extra,constructs,typescript,aws-sdk,aws-sdk-mock,ts-jest,jest,${{ steps.list-packages.outputs.list }}')
           done
 
       # This will ensure the current lockfile is up-to-date with the dependency specifications (necessary for "yarn update" to run)