⬆️ Update actions/checkout action to v4 (#193)

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

.github/workflows/onpr_check-pr.yaml

@@ -15,7 +15,7 @@ jobs:
       changedChangelogFiles: ${{ steps.changed-files.outputs.changelogs_files }}
     steps:
       - name: ↩️ Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: 📂 Detect chanced addons
         uses: dorny/paths-filter@v2
@@ -61,7 +61,7 @@ jobs:
         addon: ${{ fromJSON(needs.check-addon-changes.outputs.changedAddons) }}
     steps:
       - name: ↩️ Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: 🔎 Check if a label for the addon exists
         shell: bash
@@ -83,7 +83,7 @@ jobs:
         addon: ${{ fromJSON(needs.check-addon-changes.outputs.changedAddons) }}
     steps:
       - name: ↩️ Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: 🔎 Run Home Assistant Add-on Lint
         uses: frenck/action-addon-linter@v2
@@ -101,7 +101,7 @@ jobs:
         addon: ${{ fromJSON(needs.check-addon-changes.outputs.changedAddons) }}
     steps:
       - name: ↩️ Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: ℹ️ Gather addon info
         id: information