Bump actions/checkout from 5 to 6 in the actions-infrastructure group (#751)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/deploy.yml

@@ -21,7 +21,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
         -   name: Checkout
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
                 submodules: recursive
                 fetch-depth: 0

.github/workflows/linkcheck.yml

@@ -21,7 +21,7 @@ jobs:
         steps:
 
         -   name: Checkout
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
                 submodules: recursive
                 fetch-depth: 0

.github/workflows/validation.yml

@@ -19,7 +19,7 @@ jobs:
     latin-phrases:
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v5
+        -   uses: actions/checkout@v6
         -   uses: actions/setup-python@v6
             with:
                 python-version: 3.12
@@ -33,7 +33,7 @@ jobs:
     remark:
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v5
+        -   uses: actions/checkout@v6
         -   uses: actions/setup-node@v6
             with:
                 node-version: 22
@@ -44,7 +44,7 @@ jobs:
     bep-leads:
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v5
+        -   uses: actions/checkout@v6
             with:
                 submodules: true
         -   uses: actions/setup-python@v6
@@ -60,7 +60,7 @@ jobs:
     apps:
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v5
+        -   uses: actions/checkout@v6
         -   uses: actions/setup-python@v6
             with:
                 python-version: 3.12