Update dependabot settings

- Cooldown period to 15 days
- Update schedule to weekly
- Remove assignees

Author: marcospri

.github/dependabot.yml

@@ -1,15 +1,12 @@
-# Docs: https://help.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates
-
 version: 2
 updates:
   # Enable version updates for python
   - package-ecosystem: "pip"
     directory: "/"
     open-pull-requests-limit: 20
+    cooldown-period: 15 # Wait 15 days after release before opening a PR
     schedule:
-      interval: "daily"
+      interval: "weekly"
     pull-request-branch-name:
       # so it's compatible with docker tags
-      separator: "-"
-    assignees:
-      - tsx
+      separator: "-"