Bump actions/checkout from 5 to 6

.github/workflows/ci.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: '3.x'
@@ -47,7 +47,7 @@ jobs:
           - macos-latest
           - ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install dependencies
         if: matrix.os == 'macos-latest'
         run: |
@@ -97,7 +97,7 @@ jobs:
           - x64
         nthreads: [1, 2]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -138,7 +138,7 @@ jobs:
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -167,7 +167,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: julia-actions/julia-buildpkg@latest
       - uses: julia-actions/julia-docdeploy@latest
         env:
@@ -178,7 +178,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - uses: julia-actions/setup-julia@v2
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install JuliaFormatter and format
         # This will use the latest version by default but you can set the version like so:
         # julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter", version="0.13.0"))'