feat(deps) configure 7 day cooldown for external dependencies

Author: cgoetz-inovex

.github/dependabot.yml

@@ -4,7 +4,22 @@ updates:
     directory: "/" 
     schedule:
       interval: "daily"
+    groups:
+      internal-deps:
+        patterns:
+            - "^github.com/stackitcloud/"
+      external-deps:
+        patterns:
+            - ".*"
+        exclude-patterns:
+            # should be covered by listing internal-deps first (https://docs.github.com/en/code-security/reference/supply-chain-security/dependabot-options-reference#groups--)
+            # but listing it here to be explicit
+            - "^github.com/stackitcloud/"
+        cooldown:
+          default-days: 7
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "daily"
+    cooldown:
+        default-days: 7