chore: Add 7-day cooldown to Dependabot version updates. (#224)

Author: goloroden

.github/dependabot.yml

@@ -2,6 +2,8 @@ version: 2
 updates:
 - package-ecosystem: pip
   directory: "/"
+  cooldown:
+    default-days: 7
   schedule:
     interval: weekly
   open-pull-requests-limit: 10
@@ -14,6 +16,8 @@ updates:
 
 - package-ecosystem: docker
   directory: "/tests/shared/docker/eventsourcingdb"
+  cooldown:
+    default-days: 7
   schedule:
     interval: weekly
   open-pull-requests-limit: 10
@@ -26,6 +30,8 @@ updates:
 
 - package-ecosystem: "github-actions"
   directory: "/"
+  cooldown:
+    default-days: 7
   schedule:
     interval: weekly
   open-pull-requests-limit: 10