⬆️(ci) upgrade GitHub Actions workflow steps to latest versions

Update all GitHub Actions to their latest major versions for improved
performance, security patches, and Node.js runtime compatibility.

Signed-off-by: Stephan Meijer <me@stephanmeijer.com>

.github/workflows/docker-hub.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       -
         name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v3

.github/workflows/find.yml

@@ -14,7 +14,7 @@ jobs:
     if: github.event_name == 'pull_request' # Makes sense only for pull requests
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: show
@@ -37,7 +37,7 @@ jobs:
       github.event_name == 'pull_request'
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 50
       - name: Check that the CHANGELOG has been modified in the current branch
@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
       - name: Check CHANGELOG max line length
         run: |
           max_line_length=$(cat CHANGELOG.md | grep -Ev "^\[.*\]: https://github.com" | wc -L)
@@ -131,7 +131,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Create writable /data
         run: |

.github/workflows/release-helm-chart.yaml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0