📖 fix title to make clear plugins which are deprecated

Author: camilamacedo86

docs/book/src/SUMMARY.md

@@ -117,8 +117,8 @@
   - [Available Plugins](./plugins/available-plugins.md)
     - [To scaffold a project](./plugins/to-scaffold-project.md)
       - [go/v2 (Deprecated)](./plugins/go-v2-plugin.md)
-      - [go/v3 (Default init scaffold)](./plugins/go-v3-plugin.md)
-      - [go/v4](./plugins/go-v4-plugin.md)
+      - [go/v3 (Deprecated)](./plugins/go-v3-plugin.md)
+      - [go/v4 (Default init scaffold)](./plugins/go-v4-plugin.md)
     - [To add optional features](./plugins/to-add-optional-features.md)
       - [declarative/v1](./plugins/declarative-v1.md)
       - [grafana/v1-alpha](./plugins/grafana-v1-alpha.md)