Update dependabot.yml

We would like to introduce to work with the dev branch rather only with main branch. For this we also would love to test dependency updates before we accept them in the main branch.

Author: FalkWolsky

.github/dependabot.yml

@@ -6,15 +6,19 @@ updates:
     directory: "/server/api-service"
     schedule:
       interval: "monthly"
+    target-branch: "dev"
   - package-ecosystem: "npm"
     directory: "/server/node-service"
     schedule:
       interval: "monthly"
+    target-branch: "dev"
   - package-ecosystem: "npm"
     directory: "/client"
     schedule:
       interval: "monthly"
+    target-branch: "dev"
   - package-ecosystem: "docker"
     directory: "/deploy/docker"
     schedule:
       interval: "monthly"
+    target-branch: "dev"