[update] minor fix (npm or yarn)

Author: serhiipylypchuk1991

docs/guides/integration_with_angular.md

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

docs/guides/integration_with_svelte.md

@@ -58,7 +58,7 @@ Now you should get the DHTMLX Event Calendar source code. First of all, stop the
 
 ### Step 1. Package installation
 
-Download the [**trial Event Calendar package**](/how_to_start/#installing-trial-event-calendar-via-npm-and-yarn) and follow steps mentioned in the README file. Note that trial Event Calendar is available 30 days only.
+Download the [**trial Event Calendar package**](/how_to_start/#installing-trial-event-calendar-via-npm-or-yarn) and follow steps mentioned in the README file. Note that trial Event Calendar 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 Event Calendar source code. First of all, stop the
 
 ### Step 1. Package installation
 
-Download the [**trial Event Calendar package**](/how_to_start/#installing-trial-event-calendar-via-npm-and-yarn) and follow steps mentioned in the README file. Note that trial Event Calendar is available 30 days only.
+Download the [**trial Event Calendar package**](/how_to_start/#installing-trial-event-calendar-via-npm-or-yarn) and follow steps mentioned in the README file. Note that trial Event Calendar is available 30 days only.
 
 ### Step 2. Component creation
 

docs/how_to_start.md

@@ -35,21 +35,21 @@ There are two necessary files:
 </html>
 ~~~
 
-### Installing Event Calendar via npm and yarn
+### Installing Event Calendar via npm or yarn
 
 You can import JavaScript Event Calendar into your project using `yarn` or `npm` package manager.
 
 :::info
 If you want to integrate Event Calendar into React, Angular, Svelte or Vue projects, refer to the corresponding [**integration guides**](/category/backend-and-frameworks-integration/) for more information.
 :::
 
-#### Installing trial Event Calendar via npm and yarn
+#### Installing trial Event Calendar via npm or yarn
 
 :::info
 If you want to use trial version of Event Calendar, download the [**trial Event Calendar package**](https://dhtmlx.com/docs/products/dhtmlxEventCalendar/download.shtml) and follow steps mentioned in the *README* file. Note that trial Event Calendar is available 30 days only.
 :::
 
-#### Installing PRO Event Calendar via npm and yarn
+#### Installing PRO Event Calendar 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 Event Calendar license is active.