chore(deps): update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       # === SETUP PHASE ===
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           submodules: recursive
 
@@ -48,7 +48,7 @@ jobs:
           cache-dependency-path: 'package-lock.json'
 
       - name: Repository lampy
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           submodules: recursive
           repository: koromerzhin/lampy