chore: update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           submodules: recursive
 
@@ -48,7 +48,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           submodules: recursive
 
@@ -71,7 +71,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           submodules: recursive
 
@@ -102,7 +102,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           submodules: recursive
 
@@ -127,7 +127,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           submodules: recursive
 

.github/workflows/publish.yml

@@ -24,7 +24,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
         with:
           submodules: recursive
           fetch-depth: 0