switch from renovate to dependabot...

...because the latter is part of github

.github/dependabot.yaml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "terraform"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

renovate.json

@@ -1,3 +0,0 @@
-{
-  "extends": ["config:base", ":disableDependencyDashboard"]
-}