chore: add dependabot cooldown settings

Author: Tethik

.github/dependabot.yml

@@ -13,6 +13,11 @@ updates:
           - "minor"
           - "patch"
 
+    cooldown:
+      default-days: 7
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3
   - package-ecosystem: gomod
     directories: [".", "./.sage", "./cmd/saga"]
     schedule:
@@ -25,3 +30,8 @@ updates:
           - "minor"
           - "patch"
 
+    cooldown:
+      default-days: 7
+      semver-major-days: 30
+      semver-minor-days: 7
+      semver-patch-days: 3