ci(deps): bump actions/checkout from 5 to 6 (#59)

Author: dependabot[bot]

.github/workflows/autoupdate.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Fetch latest Python 3.12 release
         if: ${{ github.event.schedule == '0 18 10 2-12/2 *' || github.event_name == 'workflow_dispatch' }}

.github/workflows/publish-3.12.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract version number
         id: tags

.github/workflows/publish-3.13.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract version number
         id: tags

.github/workflows/publish-3.14.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract version number
         id: tags