Update checkouts

.github/workflows/ci.yaml

@@ -45,7 +45,7 @@ jobs:
           - ^1.25
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
@@ -75,7 +75,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
@@ -107,7 +107,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
@@ -127,7 +127,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           submodules: recursive