chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/test-increased-wait-time.yml

@@ -56,7 +56,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - uses: ./
         id: current

.github/workflows/test-negative.yml

@@ -38,7 +38,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - uses: ./
         id: current

.github/workflows/test-positive.yml

@@ -57,7 +57,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - uses: ./
         id: current

.github/workflows/test-wrong-status.yml

@@ -57,7 +57,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - uses: ./
         id: current