Create dependabot.yml to automatically update github actions (#251)

* Create dependabot.yml

* Configure CI for merge groups

Author: damianhxy

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

.github/workflows/python-app.yml

@@ -8,7 +8,8 @@ on:
     branches: [ master ]
   pull_request:
     branches: [ master ]
-
+  merge_group:
+    branches: [ master ]
 jobs:
   linting:
     runs-on: ubuntu-latest