Bump actions/checkout from 5 to 6 in the dependencies group (#750)

Author: dependabot[bot]

.github/workflows/api-breakage.yml

@@ -14,7 +14,7 @@ jobs:
       image: swift:latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
     # https://github.com/actions/checkout/issues/766

.github/workflows/benchmark.yml

@@ -33,7 +33,7 @@ jobs:
       image: ${{ matrix.image }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
       image: ${{ matrix.image }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Test
       run: |
         swift test --enable-code-coverage

.github/workflows/nightly.yml

@@ -14,7 +14,7 @@ jobs:
       image: swiftlang/swift:${{ matrix.image }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Test
       run: |
         swift test

.github/workflows/validate.yml

@@ -12,7 +12,7 @@ jobs:
     timeout-minutes: 15
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 1
     - name: run script

.github/workflows/verify-documentation.yml

@@ -17,12 +17,12 @@ jobs:
       run: |
         apt-get update && apt-get install -y rsync bc
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
         path: "package"
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         repository: "hummingbird-project/hummingbird-docs"
         fetch-depth: 0