Remove redundant alpha version from READMEs

Author: vgvoleg

packages/api/README.md

@@ -13,7 +13,7 @@ The `@ydbjs/api` package provides TypeScript/JavaScript bindings for interacting
 Install the package using npm:
 
 ```sh
-npm install @ydbjs/api@alpha
+npm install @ydbjs/api
 ```
 
 ## Usage

packages/auth/README.md

@@ -16,7 +16,7 @@ The `@ydbjs/auth` package provides authentication utilities for interacting with
 Install the package using npm:
 
 ```sh
-npm install @ydbjs/auth@6.0.0@alpha
+npm install @ydbjs/auth
 ```
 
 ---

packages/core/README.md

@@ -14,7 +14,7 @@ The `@ydbjs/core` package provides the core driver and connection management for
 ## Installation
 
 ```sh
-npm install @ydbjs/core@alpha
+npm install @ydbjs/core
 ```
 
 ## How It Works

packages/query/README.md

@@ -16,7 +16,7 @@ The `@ydbjs/query` package provides a high-level, type-safe client for executing
 ## Installation
 
 ```sh
-npm install @ydbjs/core@alpha @ydbjs/query@alpha
+npm install @ydbjs/core @ydbjs/query
 ```
 
 ## How It Works

packages/query/README.ru.md

@@ -16,7 +16,7 @@
 ## Установка
 
 ```sh
-npm install @ydbjs/core@alpha @ydbjs/query@alpha
+npm install @ydbjs/core @ydbjs/query
 ```
 
 ## Как это работает

packages/value/README.md

@@ -14,7 +14,7 @@ The `@ydbjs/value` package provides utilities for working with YDB values and ty
 Install the package using npm:
 
 ```sh
-npm install @ydbjs/value@alpha
+npm install @ydbjs/value
 ```
 
 ## Usage