chore: fixup dependabot config

Author: chadsr

.github/dependabot.yml

@@ -5,15 +5,15 @@
 
 version: 2
 updates:
-  - package-ecosystem: "pip" # See documentation for possible values
-    directory: "/" # Location of package manifests
+  - package-ecosystem: "uv"
+    directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "monthly"
   - package-ecosystem: "gitsubmodule"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "monthly"