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

Author: renovate[bot]

.github/workflows/auto_release.yaml

@@ -31,7 +31,7 @@ jobs:
       should_release: ${{ steps.release.outputs.should_release }}
     steps:
       - name: 🧾 Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           lfs: true
           submodules: "recursive"

.github/workflows/release.yaml

@@ -33,7 +33,7 @@ jobs:
       DOTNET_NOLOGO: true
     steps:
       - name: 🧾 Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           lfs: true
           submodules: "recursive"

.github/workflows/spellcheck.yaml

@@ -15,7 +15,7 @@ jobs:
       run:
         working-directory: '.'
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         name: 🧾 Checkout
 
       - uses: streetsidesoftware/cspell-action@v8

.github/workflows/tests.yaml

@@ -26,7 +26,7 @@ jobs:
         shell: bash
     steps:
       - name: 🧾 Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           lfs: true
           submodules: "recursive"