ci: upgrade GitHub Actions to Node 24 + add CODEOWNERS and Dependabot

.github/CODEOWNERS

@@ -0,0 +1,7 @@
+# Code owners for this repository.
+# Listed owners are automatically requested for review when a matching file
+# changes. This also drives reviewer assignment for automated (e.g. Dependabot)
+# workflow PRs.
+# https://docs.github.com/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+/.github/workflows/ @Abdul-Muqadim-Arbisoft

.github/dependabot.yml

@@ -0,0 +1,25 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+
+  - package-ecosystem: "docker"
+    directory: "/tutorjupyter/templates/jupyter/build/hub"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+
+  - package-ecosystem: "docker"
+    directory: "/tutorjupyter/templates/jupyter/build/lab"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"

.github/workflows/sync.yml

@@ -8,7 +8,7 @@ jobs:
   sync:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Add remote

.github/workflows/test.yml

@@ -13,9 +13,9 @@ jobs:
       matrix:
         python-version: ["3.9", "3.12"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies