Summary: Removed basic grammatical errors in two docs files: architecture.mdx and client-plugin-lifecycle.mdx ## Changelog Update architecture.mdx and client-plugin-lifecycle.mdx docs Pull Request resolved: https://github.com/facebook/flipper/pull/1459 Test Plan: There is only text change in documentation. The code is unchanged. Reviewed By: cekkaewnumchai Differential Revision: D23101962 Pulled By: passy fbshipit-source-id: 24d9233d67a19745696b40ea6c2d3ac2d26231c3