ci: ignore beats in dependabot config (#6086) (#6151)

(cherry picked from commit 0f5fbd7)

Co-authored-by: kruskall <99559985+kruskall@users.noreply.github.com>

.github/dependabot.yml

@@ -22,6 +22,8 @@ updates:
       - dependency-name: "go.opentelemetry.io/collector/*"
       - dependency-name: "github.com/open-telemetry/opentelemetry-collector-contrib/*"
       - dependency-name: "github.com/elastic/opentelemetry-collector-components/*"
+    ignore:
+      - dependency-name: "github.com/elastic/beats/*"
     reviewers:
       - "elastic/elastic-agent-control-plane"
     open-pull-requests-limit: 10