Bump actions/checkout from 6 to 7 (backport #1829) (#1841)

Author: mergify[bot]

.github/workflows/check_links.yml

@@ -10,7 +10,7 @@ jobs:
   check_links:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Restore lychee cache
         id: restore-cache
         uses: actions/cache/restore@v5

.github/workflows/ci-format.yml

@@ -15,7 +15,7 @@ jobs:
     name: Format
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - uses: actions/setup-python@v6
       with:
         python-version: 3.10.4

.github/workflows/reusable_ici.yml

@@ -57,10 +57,10 @@ jobs:
     steps:
       - name: Checkout ${{ github.ref_name }} since build is not scheduled
         if: ${{ github.event_name != 'schedule' }}
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Checkout ${{ inputs.ref_for_scheduled_build }} on scheduled build
         if: ${{ github.event_name == 'schedule' }}
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: ${{ inputs.ref_for_scheduled_build }}
       - run: docker network create --subnet=192.168.56.0/24 --gateway 192.168.56.254 ursim_net