[update] minor fix (npm or yarn)

Author: serhiipylypchuk1991

docs/guides/integration_with_angular.md

@@ -53,7 +53,7 @@ Now you should get the DHTMLX To Do List source code. First of all, stop the app
 
 ### Step 1. Package installation
 
-Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-and-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
+Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-or-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
 
 ### Step 2. Component creation
 

docs/guides/integration_with_react.md

@@ -56,7 +56,7 @@ Now you should get the DHTMLX To Do List source code. First of all, stop the app
 
 ### Step 1. Package installation
 
-Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-and-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
+Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-or-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
 
 ### Step 2. Component creation
 

docs/guides/integration_with_svelte.md

@@ -64,7 +64,7 @@ Now you should get the DHTMLX To Do List source code. First of all, stop the app
 
 ### Step 1. Package installation
 
-Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-and-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
+Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-or-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
 
 ### Step 2. Component creation
 

docs/guides/integration_with_vue.md

@@ -60,7 +60,7 @@ Now you should get the DHTMLX To Do List source code. First of all, stop the app
 
 ### Step 1. Package installation
 
-Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-and-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
+Download the [**trial To Do List package**](/how_to_start/#installing-to-do-list-via-npm-or-yarn) and follow steps mentioned in the README file. Note that trial To Do List is available 30 days only.
 
 ### Step 2. Component creation
 

docs/how_to_start.md

@@ -41,17 +41,17 @@ You need to include the following two files:
 </html>
 ~~~
 
-### Installing To Do List via npm and yarn
+### Installing To Do List via npm or yarn
 
 You can import JavaScript To Do List into your project using `yarn` or `npm` package manager.
 
-#### Installing trial To Do List via npm and yarn
+#### Installing trial To Do List via npm or yarn
 
 :::info
 If you want to use trial version of To Do List, download the [**trial To Do List package**](https://dhtmlx.com/docs/products/dhtmlxTodo/download.shtml) and follow steps mentioned in the *README* file. Note that trial To Do List is available 30 days only.
 :::
 
-#### Installing PRO To Do List via npm and yarn
+#### Installing PRO To Do List via npm or yarn
 
 :::info
 You can access the DHTMLX private **npm** directly in the [Client's Area](https://dhtmlx.com/clients/) by generating your login and password for **npm**. A detailed installation guide is also available there. Please note that access to the private **npm** is available only while your proprietary To Do List license is active.