chore: add github-actions grouping to dependabot config (#104)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Malcolmnixon <1863707+Malcolmnixon@users.noreply.github.com>

Author: Copilot

.github/dependabot.yml

@@ -11,6 +11,10 @@ updates:
     labels:
       - "dependencies"
       - "github-actions"
+    groups:
+      github-actions-dependencies:
+        patterns:
+          - "*"
 
   # NuGet dependencies
   - package-ecosystem: "nuget"