github: workflows: bump checkout action to v6

Bump the checkout action from v5 to v6.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: cannectivity
           persist-credentials: false

.github/workflows/docs.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false