Update actions/checkout to v6 across all workflows

Bump actions/checkout to v6 in all GitHub Actions workflow files so that
we are moved off the old Node20.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: gsavage

.github/workflows/binary_provenance.yml

@@ -34,7 +34,7 @@ jobs:
             matrix:
                 artifact: ${{fromJson(inputs.artifacts)}}
         steps:
-        - uses: actions/checkout@v4
+        - uses: actions/checkout@v6
 
         - uses: actions/download-artifact@v4
           with:

.github/workflows/daily-cli-tests.yml

@@ -11,7 +11,7 @@ jobs:
     outputs:
       trail_name: ${{ steps.prep.outputs.trail_name }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Prepare
         id: prep

.github/workflows/docker.yml

@@ -50,7 +50,7 @@ jobs:
       packages: write
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 3
 

.github/workflows/helm-chart.yml

@@ -23,7 +23,7 @@ jobs:
           app-id: ${{ vars.CI_SIGNED_COMMIT_APP_ID }}
           private-key: ${{ secrets.CI_SIGNED_COMMIT_APP_PRIVATE_KEY }}
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           token: ${{ steps.generate_token.outputs.token }}
           fetch-depth: 0

.github/workflows/init_kosli.yml

@@ -31,7 +31,7 @@ jobs:
             pull-requests: read
         steps:
 
-        - uses: actions/checkout@v4
+        - uses: actions/checkout@v6
           with:
             fetch-depth: 0
 

.github/workflows/install-script-tests.yml

@@ -21,7 +21,7 @@ jobs:
 
         steps:
         - name: Checkout repository
-          uses: actions/checkout@v5
+          uses: actions/checkout@v6
 
         - name: Run install script
           shell: bash

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
       trail_name: ${{ steps.prep.outputs.trail_name }}
       trail_template_file: ${{ steps.prep.outputs.trail_template_file }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Prepare
         id: prep

.github/workflows/never_alone_trail.yml

@@ -40,7 +40,7 @@ jobs:
             pull-requests: read
         steps:
 
-        - uses: actions/checkout@v4
+        - uses: actions/checkout@v6
           with:
             fetch-depth: 0
 

.github/workflows/publish_branch_docs.yml

@@ -10,7 +10,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Generate json
         run: |

.github/workflows/publish_docs.yml

@@ -14,7 +14,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # Deploy to local repo
       - name: Deploy