Update actions/cache action to v5 (#226)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/check_pr.yaml

@@ -141,7 +141,7 @@ jobs:
     needs: [get-target]
     if: ${{ !github.event.issue.pull_request && needs.get-target.outputs.action == 'check' }}
     steps:
-      - uses: actions/cache/restore@v4
+      - uses: actions/cache/restore@v5
         id: restore-issues
         name: Restore cache
         with:

.github/workflows/download_issues.yaml

@@ -24,7 +24,7 @@ jobs:
         with:
           python-version: '3.13'
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: downloaded/
           key: issues-dump-v2-${{ github.run_id }}