revert: docs: cleaned "Developer guide" section navigation

This reverts commit b084863.

Author: pvdlg

SUMMARY.md

@@ -22,8 +22,8 @@
 
 ## Developer guide
 - [JavaScript API](docs/developer-guide/js-api.md)
-- [Plugin development](docs/developer-guide/plugin.md)
-- [Shareable configuration development](docs/developer-guide/shareable-configuration.md)
+- [Plugin](docs/developer-guide/plugin.md)
+- [Shareable configuration](docs/developer-guide/shareable-configuration.md)
 
 ## Support
 - [Resources](docs/support/resources.md)