Group github actions in dependabot.yml (#38)

<!-- Reference any GitHub issues resolved by this PR -->

Closes #

## Introduced changes

<!-- A brief description of the changes -->

Small thing, but will improve commit history readability  

## Checklist

<!-- Make sure all of these are complete -->

- [ ] Linked relevant issue
- [ ] Updated relevant documentation
- [ ] Added relevant tests
- [x] Performed self-review of the code
- [ ] Added changes to `CHANGELOG.md`

.github/dependabot.yml

@@ -16,3 +16,7 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
+    groups:
+      actions:
+        patterns:
+          - "*"