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

Author: renovate[bot]

.github/workflows/containers-azure.yml

@@ -18,7 +18,7 @@ jobs:
       packages: write
       id-token: write
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: actions/[email protected]
         with:

.github/workflows/containers-ctfd.yml

@@ -17,7 +17,7 @@ jobs:
       contents: read
       packages: write
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: actions/[email protected]
         with:

.github/workflows/containers-kctf.yaml

@@ -15,7 +15,7 @@ jobs:
       id-token: write
       packages: write
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: google-github-actions/auth@v3
         with:

.github/workflows/containers-kubernetes.yml

@@ -17,7 +17,7 @@ jobs:
       contents: read
       packages: write
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: actions/[email protected]
         with:

.github/workflows/create.yml

@@ -13,7 +13,7 @@ jobs:
       contents: write
       issues: write
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: actions/[email protected]
         with:

.github/workflows/pages.yml

@@ -14,7 +14,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: actions/[email protected]
         with:

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
           dir_names_max_depth: 2 # return challenge root folders
           files: "!.*/**" # assume noone modifies a challenge and pages in the same PR
 
-      - uses: actions/checkout@v5.0.1
+      - uses: actions/checkout@v6.0.0
 
       - uses: actions/[email protected]
         with: