Add dependabot to this project

At the moment, we don't have any dependabot setup on this project

.github/dependabot.yaml

@@ -0,0 +1,17 @@
+---
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  # Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    # Stop dependabot automatically rebases open pull requests when it
+    # detects any changes
+    rebase-strategy: "disabled"