docs: clarify kind for hotUpdate / handleHotUpdate hooks (#20700)

Author: sapphi-red

docs/guide/api-environment-plugins.md

@@ -70,6 +70,7 @@ Plugins should set default values using the `config` hook. To configure each env
 ## The `hotUpdate` Hook
 
 - **Type:** `(this: { environment: DevEnvironment }, options: HotUpdateOptions) => Array<EnvironmentModuleNode> | void | Promise<Array<EnvironmentModuleNode> | void>`
+- **Kind:** `async`, `sequential`
 - **See also:** [HMR API](./api-hmr)
 
 The `hotUpdate` hook allows plugins to perform custom HMR update handling for a given environment. When a file changes, the HMR algorithm is run for each environment in series according to the order in `server.environments`, so the `hotUpdate` hook will be called multiple times. The hook receives a context object with the following signature:

docs/guide/api-plugin.md

@@ -403,6 +403,7 @@ Vite plugins can also provide hooks that serve Vite-specific purposes. These hoo
 ### `handleHotUpdate`
 
 - **Type:** `(ctx: HmrContext) => Array<ModuleNode> | void | Promise<Array<ModuleNode> | void>`
+- **Kind:** `async`, `sequential`
 - **See also:** [HMR API](./api-hmr)
 
   Perform custom HMR update handling. The hook receives a context object with the following signature: