fix: update find-exercise workflow to also work on closed issues (#71)

Author: FidelusAleksander

.github/workflows/find-exercise-issue.yml

@@ -38,7 +38,7 @@ jobs:
             const response = await github.rest.issues.listForRepo({
               owner: context.repo.owner,
               repo: context.repo.repo,
-              state: 'open',
+              state: 'all',
               sort: 'created',    // Sort by creation date
               direction: 'desc',  // Newest first (descending order)
               per_page: 50