Help page for new platform version notification template

ui-ngx/src/assets/help/en_US/notification/new_platform_version.md

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+#### New platform version notification templatization
+
+<div class="divider"></div>
+<br/>
+
+Notification subject and message fields support templatization. The list of available templatization parameters depends on the template type.
+See the available types and parameters below:
+
+Available template parameters:
+
+  * *recipientEmail* - email of the recipient;
+  * *recipientFirstName* - first name of the recipient;
+  * *recipientLastName* - last name of the recipient;
+  * *latestVersion* - the latest platform version available;
+  * *latestVersionReleaseNotesUrl* - release notes link for latest version;
+  * *upgradeInstructionsUrl* - upgrade instructions link for latest version;    
+  * *currentVersion* - the current platform version 
+  * *currentVersionReleaseNotesUrl* - release notes link for current version;
+
+Parameter names must be wrapped using `${...}`. For example: `${recipientFirstName}`. 
+You may also modify the value of the parameter with one of the suffixes:
+
+  * `upperCase`, for example - `${recipientFirstName:upperCase}`
+  * `lowerCase`, for example - `${recipientFirstName:lowerCase}`
+  * `capitalize`, for example - `${recipientFirstName:capitalize}`
+
+<div class="divider"></div>
+
+##### Examples
+
+Let's assume that new 3.5.0 version is released but currently deployed version is 3.4.4. The following template:
+
+```text
+New version ${latestVersion} is available. Current version is ${currentVersion}
+{:copy-code}
+```
+
+will be transformed to:
+
+```text
+New version 3.5.0 is available. Current version is 3.4.4
+{:copy-code}
+```
+
+<br>
+<br>