🩹 [Patch]: Add labels to Dependabot updates for better categorization (#84)

## Description

This pull request adds labels to Dependabot configuration for both
GitHub Actions and NuGet updates. This will help categorize and filter
automated pull requests more easily.

- Dependabot configuration improvements:
* Added `dependencies` and `github-actions` labels to GitHub Actions
updates in `.github/dependabot.yml`.
* Added `dependencies` and `nuget` labels to NuGet updates in
`.github/dependabot.yml`.

Author: MariusStorhaug

.github/dependabot.yml

@@ -7,9 +7,15 @@ version: 2
 updates:
   - package-ecosystem: github-actions # See documentation for possible values
     directory: / # Location of package manifests
+    labels:
+      - dependencies
+      - github-actions
     schedule:
       interval: weekly
   - package-ecosystem: nuget # See documentation for possible values
     directory: / # Location of package manifests
+    labels:
+      - dependencies
+      - nuget
     schedule:
       interval: weekly