chore: fix codecov workflow (#97)

runs are currently failing because `runs-on` is required:
https://github.com/aws/aws-cdk-cli/actions/runs/13461282048

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

---------

Co-authored-by: Momo Kornher <[email protected]>

Author: kaizencc

.github/workflows/codecov.yml

@@ -1283,7 +1283,7 @@ new CdkCliIntegTestsWorkflow(repo, {
 });
 
 new CodeCovWorkflow(repo, {
-  restrictToRepos: ['aws-cdk-cli/aws-cdk-cli'],
+  restrictToRepos: ['aws/aws-cdk-cli'],
   packages: [cli.name],
 });
 

.projenrc.ts

@@ -24,6 +24,7 @@ export class CodeCovWorkflow extends Component {
     });
 
     this.workflow.addJob('collect', {
+      runsOn: ['aws-cdk_ubuntu-latest_4-core'],
       permissions: { idToken: JobPermission.WRITE },
       if: props.restrictToRepos.map(r => `github.repository == '${r}'`).join(' || '),
       steps: [