add github actions to dependabot.yml

Author: cibere

.github/dependabot.yml

@@ -5,7 +5,15 @@
 
 version: 2
 updates:
-  - package-ecosystem: "pip" # See documentation for possible values
-    directory: "/" # Location of package manifests
+
+  # Library dependencies from pyproject.toml
+  - package-ecosystem: "pip"
+    directory: "/"
     schedule:
       interval: "weekly"
+
+  # Actions from github workflows
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"