feat: group GitHub Actions and Docker updates in dependabot configuration (#70)

Co-authored-by: ChristophShyper <45788587+ChristophShyper@users.noreply.github.com>

Author: github-actions[bot]

.github/dependabot.yml

@@ -1,22 +1,46 @@
 version: 2
 updates:
-  - package-ecosystem: "github-actions"
+  - package-ecosystem: github-actions
     directory: "/.github/workflows"
     schedule:
-      interval: "daily"
-  - package-ecosystem: "github-actions"
+      interval: weekly
+    groups:
+      gha-all:
+        patterns:
+          - "*"
+
+  - package-ecosystem: github-actions
     directory: "/templates/actions/workflows"
     schedule:
-      interval: "daily"
-  - package-ecosystem: "github-actions"
+      interval: weekly
+    groups:
+      gha-all:
+        patterns:
+          - "*"
+
+  - package-ecosystem: github-actions
     directory: "/templates/dockerized/workflows"
     schedule:
-      interval: "daily"
-  - package-ecosystem: "github-actions"
+      interval: weekly
+    groups:
+      gha-all:
+        patterns:
+          - "*"
+
+  - package-ecosystem: github-actions
     directory: "/templates/other/workflows"
     schedule:
-      interval: "daily"
-  - package-ecosystem: "github-actions"
+      interval: weekly
+    groups:
+      gha-all:
+        patterns:
+          - "*"
+
+  - package-ecosystem: github-actions
     directory: "/templates/static/workflows"
     schedule:
-      interval: "daily"
+      interval: weekly
+    groups:
+      gha-all:
+        patterns:
+          - "*"