chore(deps): update actions/checkout digest to df4cb1c

Author: renovate[bot]

.github/workflows/conventional_commits.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout repository
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           fetch-depth: 0
 

.github/workflows/dart.yml

@@ -20,7 +20,7 @@ jobs:
           - downgrade
     steps:
       - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           fetch-depth: 0
       - name: Login to GHCR

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout repository
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
       - name: Find relative markdown links
         run: ./tool/find-relative-markdown-links.sh

.github/workflows/publish.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
 
       - name: Set up Java
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
@@ -83,7 +83,7 @@ jobs:
             flutter: arm64
     steps:
       - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
       - name: Login to GHCR
         uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4
         with:

.github/workflows/spellcheck.yaml

@@ -6,7 +6,7 @@ jobs:
   spellcheck:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
       - uses: streetsidesoftware/cspell-action@de2a73e963e7443969755b648a1008f77033c5b2 # v8
         with:
           incremental_files_only: false