github: run dependabot less frequent

.github/dependabot.yml

@@ -3,7 +3,7 @@ updates:
   - package-ecosystem: cargo
     directory: "/"
     schedule:
-      interval: daily
+      interval: weekly
     open-pull-requests-limit: 10
     ignore:
       - dependency-name: "*"
@@ -11,7 +11,7 @@ updates:
   - package-ecosystem: cargo
     directory: "/integration-test/bins"
     schedule:
-      interval: daily
+      interval: weekly
     open-pull-requests-limit: 10
     ignore:
       - dependency-name: "*"
@@ -19,5 +19,5 @@ updates:
   - package-ecosystem: github-actions
     directory: "/"
     schedule:
-      interval: daily
+      interval: monthly
     open-pull-requests-limit: 10