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

Author: renovate[bot]

.github/workflows/release-docker.yml

@@ -23,7 +23,7 @@ jobs:
             binary-name: scip-clang-arm64-linux
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: bazel-contrib/setup-bazel@0.14.0
         with:
@@ -55,7 +55,7 @@ jobs:
             binary-name: scip-clang-arm64-linux
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Prepare
         run: |

.github/workflows/release.yml

@@ -37,7 +37,7 @@ jobs:
       run:
         shell: bash
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: "📝 Check version"
         run: |
           set -euo pipefail
@@ -123,7 +123,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: "📝 Create Release"
         run: |
           REV="$INPUT_REVISION"