chore: add 7-days cooldown to Dependabot and move to weekly bumps

Author: julien-deramond

.github/dependabot.yml

@@ -3,7 +3,9 @@ updates:
   - package-ecosystem: 'npm'
     directory: '/'
     schedule:
-      interval: 'daily'
+      interval: 'weekly'
+    cooldown:
+      default-days: 7
     open-pull-requests-limit: 20
     groups:
       github-actions:
@@ -12,7 +14,9 @@ updates:
   - package-ecosystem: 'github-actions'
     directory: '/'
     schedule:
-      interval: 'daily'
+      interval: 'weekly'
+    cooldown:
+      default-days: 7
     open-pull-requests-limit: 20
     groups:
       github-actions: