Run dependebot weekly to get feedback sooner

We can can back to monthly later when we have a better understanding of how it works.

Author: sbidoul

.github/dependabot.yml

@@ -3,12 +3,12 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "monthly"
+      interval: "weekly"
     groups:
       github-actions:
         patterns:
           - "*"
   - package-ecosystem: "pip"
     directory: "/"
     schedule:
-      interval: "monthly"
+      interval: "weekly"